小型半導体レーザーモジュール

Max Power Ranging from 4.0 to 20 mW
Six Versions with Wavelengths Ranging from 405 to 1550 nm
SM1-Threaded for Lens Tube Compatibility

Front

LDM785

785 nm, 20 mW

LDM785
Shown in
a KM200V

Rear

Please Wait

概要
仕様
レーザの安全性
Smart Pack
Feedback

Item #	Wavelength (Typical)	Beam Size (Elliptical)	Output Power	Class
LDM405	405 nm	3.0 mm x 5.0 mm	4.0 mW	3R
LDM635	635 nm	3.0 mm x 5.0 mm	4.0 mW	3R
LDM670	670 nm	2.2 mm x 4.4 mm	5.5 mW	3B
LDM785	785 nm	2.6 mm x 4.4 mm	20 mW	3B
LDM850	850 nm	3.5 mm x 4.4 mm	20 mW	3B
LDM1550	1550 nm	2.6 mm x 3.0 mm	4.5 mW	1

特長

出力値が調整可能
コリメート出力光線
ビームシャッタが組込み済み
SM1ネジ規格に対応
IEC60825-1/CDRHに準拠
電源が付属

LDMシリーズは小型のレーザ光源で、卓上での光学実験に適します。このLDMシリーズでは、405 nm、635 nm、670 nm、785 nm、850 nm、1550 nmの6つの波長のモジュールから選択可能です。

筺体寸法は、 Ø36 mm×147 mmで、典型的な帯域幅が約1 nmのファブリペロー半導体レーザ、コリメートレンズと出力コントローラが内蔵されています。各半導体レーザーモジュールには、それぞれ内蔵シャッタとSM1内ネジが備わっています。この内ネジによって、レンズチューブからレンズマウントまで、幅広い種類の光学機器の取付けが可能です。このレーザーモジュールは、一般に右図のようにSM1レンズチューブシステム内のアライメント補助として使用されます。

このLDMモジュールは、当社のV字型マウントC1512/M、C1513/M、KM200V/M、またはVC3C/Mを用いることでどのような光学テーブルにも取り付け可能です。機械的シャッタに加えて、このモジュールにはリモートインターロック接続とキーロック電源スイッチが備わっています。このレーザーモジュールには、レーザ用のENABLE/DISABLEのトグルスイッチ、電源のON/OFFを表示するLED、デバイス上部に位置するパワー調整用POTコントローラも付いています。

レーザのパワーはゼロからフルパワーに調整可能です(レーザの仕様については「仕様」のタブをご参照ください)。半導体レーザの出力はそれぞれ偏光され、多縦モードです。レーザのENABLEボタンが上を向いている時には、光は垂直方向の直線偏光となります。ただし、LDM635は水平方向に直線偏光します。各LDMには電源が付属します。

キーロック、電源入力部、および短絡ピン付きインターロック

Click to Enlarge

View Imperial Product List

型番	数量	Description
LDM785	1	小型半導体レーザーモジュール、シャッタ付き、785 nm、20 mW
C1513	1	ポスト用キネマティックV字型クランプ、クランプアームPM4が1個付属(インチ規格)
P8	1	Ø1.5インチポスト、長さ8インチ、1/4"-20タップ穴 (インチ規格)
PF175B	1	クランプフォーク、Ø38 mm(Ø1.5インチ)台座付きポストまたは台座付きポストアダプタ用、ザグリ穴スロット53.8 mm(ミリ＆インチ規格共用)

View Metric Product List

型番	数量	Description
LDM785	1	小型半導体レーザーモジュール、シャッタ付き、785 nm、20 mW
C1513/M	1	ポスト用キネマティックV字型クランプ、クランプアームPM4/Mが1個付属(ミリ規格)
P200/M	1	Ø38 mmポスト、長さ200 mm、M6タップ穴 (ミリ規格)
PF175B	1	クランプフォーク、Ø38 mm(Ø1.5インチ)台座付きポストまたは台座付きポストアダプタ用、ザグリ穴スロット53.8 mm(ミリ＆インチ規格共用)

キネマティックV字型クランプを使用してØ1.5インチ(Ø 38 mm)ポストに取り付けたLDM785

Item #	LDM405	LDM635	LDM670	LDM785	LDM850	LDM1550
Wavelength, Typical	405 nm	635 nm	670 nm	785 nm	850 nm	1550 nm
Wavelength, Min/Max	395 - 415 nm	625 - 645 nm	660 - 678 nm	776 - 800 nm	840 - 860 nm	1520 - 1580 nm
Beam Size (Elliptical)^a	3.0 mm x 5.0 mm	3.0 mm x 5.0 mm	2.2 mm x 4.4 mm	2.6 mm x 4.4 mm	3.5 mm x 4.4 mm	2.6 mm x 3.0 mm
Output Power^b	4.0 mW	4.0 mW	5.5 mW	20 mW	20 mW	4.5 mW

Common Specifications
Stability, Short Term (30 min)	0.01 dB
Stability, Long-Term Drift (24 hr)	0.1 dB
Operating Temperature	10 - 40 °C
Storage Temperature	5 - 50 °C
Power Supply (Included)	Input: 100 - 240 VAC, 0.48 A 50 - 60 Hz Output: 9 VDC @ 2.2 A

モジュールから3 m 離れた距離で測定。ビーム形状は楕円形。
最大出力値は動作温度 25 °Cでの数値。温度が異なる場合、出力数値も変動。

レーザの安全性とクラス分類

レーザを取り扱う際には、安全に関わる器具や装置を適切に取扱い、使用することが重要です。ヒトの目は損傷しやすく、レーザ光のパワーレベルが非常に低い場合でも障害を引き起こします。当社では豊富な種類の安全に関わるアクセサリをご提供しており、そのような事故や負傷のリスクの低減にお使いいただけます。可視域から近赤外域のスペクトルでのレーザ発光がヒトの網膜に損傷を与えうるリスクは極めて高くなります。これはその帯域の光が目の角膜やレンズを透過し、レンズがレーザーエネルギを、網膜上に集束してしまうことがあるためです。

安全な作業および安全に関わるアクセサリ

クラス3または4のレーザを取り扱う場合は、必ずレーザ用保護メガネを装着してください。
当社では、レーザのクラスにかかわらず、安全上無視できないパワーレベルのレーザ光線を取り扱う場合は、ネジ回しなどの金属製の器具が偶然に光の方向を変えて再び目に入ってしまうこともあるので、レーザ用保護メガネを必ずご使用いただくようにお勧めしております。
特定の波長に対応するように設計されたレーザ保護眼鏡は、装着者を想定外のレーザ反射から保護するために、レーザ装置付近では常に装着してください。
レーザ保護眼鏡には、保護機能が有効な波長範囲およびその帯域での最小光学濃度が刻印されています。
レーザ保護カーテンやレーザー安全保護用布は実験室内での高エネルギーレーザの遮光にご使用いただけます。
遮光用マテリアルは、直接光と反射光の両方を実験装置の領域に封じ込めて外に逃しません。
当社の筺体システムは、その内部に光学セットアップを収納し、レーザ光を封じ込めて危険性を最小限に抑えます。
ピグテール付き半導体レーザは、他のファイバに接続、もしくは他のファイバとの接続を外す際には、レーザ出力をOFFにしてください。パワーレベルが10 mW以上の場合には特にご注意ください。
いかなるビーム光も、テーブルの範囲で終端させる必要があります。また、レーザ使用中には、研究室の扉は必ず閉じていなければなりません。
レーザ光の高さは、目線の高さに設定しないでください。
実験は光学テーブル上で、全てのレーザービームが水平を保って直進するように設定してください。
ビーム光路の近くで作業する人は、光を反射する不要な装飾品やアクセサリ(指輪、時計など)をはずしてください。
レンズや他の光学装置が、入射光の一部を、前面や背面で反射する場合がありますのでご注意ください。
あらゆる作業において、レーザは必要最小限のパワーで動作するようにご留意ください。
アライメントは、可能な限りレーザの出力パワーを低減して作業を行ってください。
ビームパワーを抑えるためにビームシャッタやフィルタをお使いください。
レーザのセットアップの近くや実験室には、適切なレーザ標識やラベルを掲示してください。
クラス3Rやクラス4のレーザ(安全確保用のインターロックが必要となるレーザーレベルの場合)で作業する場合は、警告灯をご用意ください。
ビームトラップの代用品としてレーザービュワーカードを使用したりしないでください。

レーザ製品のクラス分け

レーザ製品は、目などの損傷を引き起こす可能性に基づいてクラス分けされています。国際電気標準会議(The International Electrotechnical Commission 「IEC」)は、電気、電子工学技術関連分野の国際規格の策定および普及を行う国際機関で、IEC60825-1は、レーザ製品の安全性を規定するIEC規格です。レーザ製品のクラス分けは下記の通りです

Class	Description	Warning Label
1	ビーム内観察用の光学機器の使用を含む、通常の条件下での使用において、安全とみなされているクラス。このクラスのレーザ製品は、通常の使用範囲内では、人体被害を及ぼすエネルギーレベルのレーザを発光することがないので、最大許容露光量(MPE)を超えることはありません。このクラス1のレーザ製品には、筐体等を開かない限り、作業者がレーザに露光することがないような、完全に囲われた高出力レーザも含まれます。
1M	クラス1Mのレーザは、安全であるが、望遠鏡や顕微鏡と併用した場合は危険な製品になり得ます。この分類に入る製品からのレーザ光は、直径の大きな光や拡散光を発光し、ビーム径を小さくするために光を集束する光学素子やイメージング用の光学素子を使わない限り、通常はMPEを超えることはありません。しかし、光を再び集光した場合は被害が増大する可能性があるので、このクラスの製品であっても、別の分類となる場合があります。
2	クラス2のレーザ製品は、その出力が最大1 mWの可視域での連続放射光に限定されます。瞬目反射によって露光が0.25秒までに制限されるので、安全と判断されるクラスです。このクラスの光は、可視域(400～700 nm)に限定されます。
2M	このクラスのレーザ製品のビーム光は、瞬目反射があるので、光学機器を通して見ない限り安全であると分類されています。このクラスは、レーザ光の半径が大きい場合や拡散光にも適用されます。
3R	クラス3Rのレーザ製品は、直接および鏡面反射の観察条件下で危険な可視光および不可視光を発生します。特にレンズ等の光学機器を使用しているときにビームを直接見ると、目が損傷を受ける可能性があります。ビーム内観察が行われなければ、このクラスのレーザ製品は安全とみなされます。このクラスでは、MPE値を超える場合がありますが、被害のリスクレベルが低いクラスです。可視域の連続光のレーザの出力パワーは、このレベルでは5 mWまでとされています。
3B	クラス3Bのレーザは、直接ビームを見た場合に危険なクラスです。拡散反射は通常は有害になることはありませんが、高出力のクラス3Bレーザを使用した場合、有害となる場合もあります。このクラスで装置を安全に操作するには、ビームを直接見る可能性のあるときにレーザ保護眼鏡を装着してください。このクラスのレーザ機器にはキースイッチと安全保護装置を設け、さらにレーザ安全表示を使用し、安全照明がONにならない限りレーザがONにならないようにすることが求められます。Class 3Bの上限に近いパワーを出力するレーザ製品は、やけどを引き起こすおそれもあります。
4	このクラスのレーザは、皮膚と目の両方に損傷を与える場合があり、これは拡散反射光でも起こりうるとみなされています。このような被害は、ビームが間接的に当たった場合や非鏡面反射でも起こることがあり、艶消し面での反射でも発生することがあります。このレベルのレーザ機器は細心の注意を持って扱われる必要があります。さらに、可燃性の材質を発火させることもあるので、火災のリスクもあるレーザであるとみなされています。クラス4のレーザには、キースイッチと安全保護装置が必要です。
全てのクラス2以上のレーザ機器には、上記が規定する標識以外に、この三角の警告標識が表示されていなければいけません。

Click to Enlarge
LDM635 Packaging

Smart Pack

Item #	% Weight Reduction	CO₂-Equivalent Reduction^a
LDM405	9.63%	0.4 kg
LDM635	9.63%	0.87 kg
LDM670	9.63%	0.49 kg
LDM785	9.63%	0.54 kg
LDM850	9.63%	0.43 kg
LDM1550	9.63%	0.62 kg

Smart Pack

Reduce Weight of Packaging Materials
Increase Usage of Recyclable Packing Materials
Improve Packing Integrity
Decrease Shipping Costs

Thorlabs' Smart Pack Initiative is aimed at waste minimization while still maintaining adequate protection for our products. By eliminating any unnecessary packaging, implementing packaging design changes, and utilizing eco-friendly packaging materials for our customers when possible, this initiative seeks to improve the environmental impact of our product packaging. Products listed above are now shipped in re-engineered packaging that minimizes the weight and the use of non-recyclable materials.^b As we move through our product line, we will indicate re-engineered packages with our Smart Pack logo.

Travel-based emissions reduction calculations are estimated based on the total weight reduction of packaging materials used for all of 2013's product sales, traveling 1,000 miles on an airplane, to provide general understanding of the impact of packaging material reduction. Calculations were made using the EPA's shipping emissions values for different modes of transport.
Some Smart Pack products may show a negative weight reduction percentage as the substitution of greener packaging materials, such as the Greenwrap, at times slightly increases the weight of the product packaging.

Posted Comments:

user (posted 2024-02-09 15:47:16.96)

How would one mount a LDM405 laser inside a cage system directly? Is it possible with off-the-shelf parts from Thorlabs, or do we have to custom machine some parts?

ksosnowski (posted 2024-02-09 12:04:19.0)

Thanks for reaching out to Thorlabs. LDM405 and the LDMxxx series of laser modules have internal SM1 threading at the output aperture which is 0.15 inches deep. Using an externally threaded lens tube coupler like SM1T2, which is 0.5 inches long, you can connect the laser to the SM1 threads in the cageplate CP33 which are 0.35" deep. The outer diameter of the LDM405 is 1.40 inches as shown on our 2D CAD file. We do not have any adapters for this specific size to raise the diameter to 2 inches for use in the larger 60mm cageplate like LCP34. There are other adapters to step between 30mm to 60mm cage sizes if needed however.

Ana Aguayo (posted 2023-01-30 17:41:13.953)

Hi! In my lab we bought a LDM785 laser and the laser spot is pretty ugly, resembles an interference pattern and I couldn't clean it even with a monomodal fiber, because I get a circular interference pattern no matters what fiber I use. I would like to know if you have some suggestions to improve the spot. Thannk you.

ksosnowski (posted 2023-02-09 11:56:18.0)

Hello Ana, thanks for reaching out to Thorlabs. It sounds like the fiber is not behaving as single mode in this setup. This could be due to the choice of fiber or launch conditions. I have reached out directly to discuss your application further.

Abhay Anand (posted 2022-06-24 13:52:07.6)

We are planning to order LDM 635. How long it will take to deliver this product ? Availability status showing lead time.

ksosnowski (posted 2022-06-24 09:43:32.0)

Thanks for reaching out to Thorlabs. Please direct any further lead time/availability questions to sales@thorlabs.com for the most prompt response.

Martin COOPER (posted 2022-02-25 11:53:28.53)

I have a LDM1550 and if you had 1064 nm and 1319 nm versions I would have bought them... Cheers

ksosnowski (posted 2022-02-25 07:04:32.0)

Thanks for reaching out to Thorlabs. While we currently do not have any compact modules like LDM1550 for 1064nm or 1319nm, depending on your spectral and power requirements you may consider our Benchtop Fiber-coupled Lasers for turnkey operation. For more narrow spectra it may require a diode and driver. I have reached out directly to discuss your application further.

user (posted 2022-01-05 14:26:21.373)

Hi, is there any idea of the response and rise time of the shutter?

cdolbashian (posted 2022-01-05 04:08:40.0)

Thank you for reaching out to us at Thorlabs. The shutter is a manual mechanical shutter, and as such does not have an associated rise time.

Damini Frey (posted 2021-11-01 14:07:02.277)

Is it possible to purchase the 9 V, 2.2 A power supply separately?

cdolbashian (posted 2021-11-04 04:13:07.0)

Thank you for reaching out to us at Thorlabs. For requests such as this, please contact techsupport@thorlabs.com in the future. I have reached out to you directly to discuss the pricing of this particular power supply.

akuznetsov (posted 2018-12-10 15:20:50.053)

What is the light output stability of these lasers in percent? Would like to see 523nm and 940nm versions of these lasers! What is the beam divergence?

YLohia (posted 2019-01-02 09:15:21.0)

Hello, thank you for contacting Thorlabs. We specify the stability in dB in the spec sheets of these lasers, with short term stability being 0.01 dB (0.230%) and long term being 0.1 dB (2.329%). Currently, these lasers are collimated by checking to make sure that the beam size stays the same over a distance of about 3m. We realize this is not a very exact process and are looking to change it in the future, but for now this is the procedure so we do not have a definitive spec for divergence. Over 3m, it's typical to see around 0.08 - 0.60 mrad divergence. I have posted a suggestion for these two wavelengths on our internal engineering forum for further consideration.

yur-yulya (posted 2017-11-23 10:11:45.257)

Does the package contain adapters for the power supply presented on the product picture?

nbayconich (posted 2017-12-28 02:45:17.0)

Thank you for contacting Thorlabs. The entire adapter set is not provided in the product picture of the LDM635. The appropriate adapter will be shipped depending on your location. If you would like the additional power supply adapters or power supplies please contact us at techsupport to request these as special order items. I will reach out to you directly with more information.

wenzel.jakob (posted 2017-10-14 23:39:25.96)

I'm interested in the degree of polarization of these laser diodes. Apart from the shutter & interlock, what are the main differences to the lower-priced CPS family of laser diode modules?

nbayconich (posted 2017-10-19 10:51:58.0)

Thank you for contacting Thorlabs. The LDM series laser diodes typically have a TE linear polarization, and have a typical PER of 20-30 dB. The LDM series have an adjustable output power and are offered with a higher output power and a longer available wavelength range than the CPS diodes. The CPS laser diodes are more for a simple plug and play option and do not have the ability to adjust the output.

leonlopez (posted 2015-07-27 00:12:13.447)

hi i am Leonardo Lopez a physical engineer from Colombia and I would like that you could send me a quote of the product #LDM670 with all expenses would have , it is a requirement that I need to buy through my university resources, thanks.

jlow (posted 2015-08-25 03:15:14.0)

Response from Jeremy at Thorlabs: We will contact you directly for a quote. You can contact us directly at sales@thorlabs.com to request a quote as well.

thomas.liebig (posted 2015-06-24 14:46:56.26)

Is there any specification on M² or divergence available. Otherwise it is also rather difficult to estimate power loss when cleaning up the profile.

besembeson (posted 2015-08-19 08:59:40.0)

Response from Bweh at Thorlabs USA: The typical value for the mean M^2 is 1.66.

user (posted 2015-06-22 16:17:09.25)

In specification tub, beam size and max power is well specified. But are they typical values or what you can offer? I am happy if I can have 3.0mm x 5.0mm size without any tolerances for all I would buy.

besembeson (posted 2015-09-21 02:35:22.0)

Response from Bweh at Thorlabs USA: These are typical values that you should expect for each corresponding unit. Note that for the beam diameter, this is measured 3mm from the module.

florian.schuelein (posted 2014-10-16 14:11:31.343)

Hi everybody, Is there an option with green laser diodes? Best regards Florian Schülein

jlow (posted 2014-10-22 03:08:09.0)

Response from Jeremy at Thorlabs: We do not currently have the green laser in the LDM modules. We do have other green laser diode modules available such as the CPS532 and CPS532-C2. You can find them at http://www.thorlabs.com/newgrouppage9.cfm?objectgroup_id=1487

thorben.jostmeier (posted 2014-08-22 10:02:34.343)

Regarding the polarization state (of the LDM1550), I can confirm what rice posted: the electric field polarization state is NOT HORIZONTAL when the enable button is facing up, but almost vertical. We checked this using a pre-aligned LPNIR polarizer.

jlow (posted 2015-01-12 04:08:46.0)

Response from Jeremy at Thorlabs: We have updated the web presentation to reflect the correct polarization direction of our laser diode modules.

stockbr (posted 2014-08-05 09:56:04.657)

What is the bandwidth of these lasers? I do not see this spec listed anywhere.

jlow (posted 2014-08-06 08:36:45.0)

Response from Jeremy at Thorlabs: These laser diodes used in these modules are regular Fabry-Perot laser diode and typically have linewidth around 1nm or so.

h.rutt (posted 2014-06-17 17:31:30.547)

This series has an 'enable' button. There needs to be provision to enable *remotely*; sometimes it is not accessible, and its also not good for alignment. The lack of one is a big problem for us right now. Obviously it would invalidate warranties etc, but would it be practical to open it up (the screws at the back presumably) & add a parallel connection across the push button to provide remote enable? (Holding it down doesnt work :-( )

jlow (posted 2014-07-29 04:05:31.0)

Response from Jeremy at Thorlabs: Thank you for your feedback. We will look into the possibility of adding this in the future. With regard to modification, it is possible to do something like that but that will definitely void the warranty. I will contact you to provide some detail on the switch.

rice (posted 2014-06-09 14:03:57.85)

Polarization state of the LDM405 laser module: the output appears to be polarized with the E-FIELD VERTICAL when the output enable button is facing up. I confirmed this by using reflection from a glass plate to observe the Brewster angle as well as by passing the beam through your LPVISE 100-A linear polarizer, which passes the beam when its polarization mark (red dot) is aligned VERTICALLY when the LDM405 is mounted with its controls facing up.

hillbill2 (posted 2014-03-24 13:39:47.363)

Is there a device to couple a PAF-SMA-11-B to the front of the LDM laser diode laser tube? (You have this capability for a HeNe laser)

cdaly (posted 2014-03-25 12:26:29.0)

Response from Chris at Thorlabs: There isn't a specific part dedicated for this purpose, but you could use an SM1T2 lens tube coupler with a CP08FP fiber port mounting cage plate in order to mate the two together. Both the LDM laser modules and this plate have internal SM1 threading which would thread onto the externally SM1-threaded coupler.

user (posted 2013-11-15 17:57:59.553)

Are the LDM series laser single longitudinal mode or multimode? thanks, j

jlow (posted 2013-11-18 08:24:17.0)

Response from Jeremy at Thorlabs: The LDM series laser are multi-longitudunal mode.

user (posted 2013-07-18 11:25:14.03)

Im looking for the M2 parameter for LDM1550. Is it similar to the M2 for LDM635 that I found here?

pbui (posted 2013-08-07 16:23:00.0)

Response from Phong at Thorlabs: We do not test the LDM1550's M2 parameter since it is not optimized for this. If you're looking to achieve a good M2 value, we would suggest coupling the laser's output to a single mode fiber to clean up the profile to make it more Gaussian.

bdada (posted 2011-11-17 17:55:00.0)

Response from Buki at Thorlabs: Thank you for your feedback. Unfortunately the only way to implement a remote enable function is just how you described, by running a pair of wires in parallel with the internal tact switch. If you prefer that we do it, please contact TechSupport@thorlabs.com to request a quote. Please note that the enable circuit requires a momentary closure to enable and disable the laser. You can leave the switch closed as long as you wish, but you need to return it to an open state and then close it again in order to toggle the state of the unit.

martinisabelle30 (posted 2011-11-02 15:12:53.0)

Hello, I purchased one of your LDM635 and LDM405 laser modules, and I need to mount it inside an enclosure and control it remotely. I understand from a previous post that they have already tried using the "Interlock" connection, but even with that switch contact closed, the "enable" button must still be pressed manually to turn the laser on. Is there anyway that this laser can be controlled remotely or without using this toggle switch? Like the user before mentioned, I might have to resort to disassemble the laser and bring the "enable" switch contacts out on a pair of wires to a second control relay. This I would prefer not doing in case of damaging the laser components. Martin

bdada (posted 2011-08-25 12:46:00.0)

Response from Buki at Thorlabs: Thank you for your feedback. Currently, we list SM1 compatibility as one of the features listed for the LDM laser modules on the web page. We also discuss it in the overview section. http://www.thorlabs.com/NewGroupPage9.cfm?ObjectGroup_ID=1219&pn=LDM635#1219 Based on your feedback, we will review the web page to see how we can better highlight the SM1 compatibility of the LDM laser modules.

v-clydew (posted 2011-08-25 07:37:02.0)

In my opinion, the most important feature of this type of laser module (LDM635, etc.) is the fact that it has 1" diameter lenstube thread on the end. I would never have known this if I had not gone into the "drawings" and looked for it specifically. This feature will sell this laser to anyone who uses Thor lenstubes and yet it is not promoted on the front page. You are missing out on sales by not pushing the lenstube feature of this alignment laser. Everyone who uses lenstubes will have a use for an alignment beam (battery driven!) that simply screws onto existing fixtures. Wake up!

Thorlabs (posted 2010-07-28 17:36:43.0)

Response from Javier at Thorlabs to last poster: Thank you for your feedback. The polarization of the laser is parallel to your optical table when the Laser Enable button is facing up.

user (posted 2010-07-25 17:35:04.0)

Hi, what is the polarization state of the LDM405 laser?. Thanks in advanced.

jens (posted 2009-06-18 18:40:20.0)

A reply from Jens at Thorlabs: the lens position can not be adjusted in this model. In order to change the beam characteristics external optics will be required.

john (posted 2009-06-16 20:52:14.0)

Is it possible for the user to adjust the collimation lens so that the output is diverging or converging?

mwalker (posted 2009-04-17 12:58:29.0)

Hello, I purchased one of your LDM635 laser modules, and I need to mount it inside an enclosure and control it remotely. I have already tried using the "Interlock" connection, but even with that switch contact closed, the "enable" button must be pressed manually to turn the laser on. Is there any way around this? If not, Im afraid Ill have to disassemble the laser and bring the "enable" switch contacts out on a pair of wires to a second control relay. Thanks for your help. -Mark

Tyler (posted 2008-04-14 15:16:20.0)

A response from Tyler at Thorlabs: The M^2 parameters for the LDM635 are as follows: x-direction: 1,094 and y-direction: 1,058 for an average value of 1,076. These values are nominal.

Tyler (posted 2008-04-07 09:34:58.0)

A response from Tyler at Thorlabs to adelon: Thank you for your interest in our laser module. Your request has been forwarded to our technical support department. They will soon be in contact with you via email.

adelon (posted 2008-04-01 05:42:58.0)

Dear sir, madam, Could you provide us more precise information about the spatial properties of the laser module LDM635 ? What are the M2 parameters along each direction of the elliptical output beam ? Sincerely yours, A.Delon

technicalmarketing (posted 2007-08-22 09:09:10.0)

Thank you for your interest in the LDM405. The power stability specifications are list under the "Specs" tab and the module does come with a power supply. For a dialog about this product please consider contacting our technical support staff.

onnes79 (posted 2007-08-22 04:52:37.0)

I'm interested in the model LDM405. Is there any information about power stability? I want to know the fluctuation of power from mean power. And does this LD module contain power-supply unit or should I buy that unit?