Products Home光ファイバーパワーメーター、内部センサー付き
- Wavelength Range: 400 - 1700 nm
- Power Range: -60 dBm to 23 dBm
- Interchangeable Fiber Connector
PM20A
Fiber Optic Power Meter
Easy-to-Read Large Digital Display
PM20 Power Meter with Fiber Adapter Removed
Additional SM05-Threaded Fiber Adapters Available Separately
PM20-SMA
PM20-ST
PM20-LC
Please Wait
| Power Meter Selection Guide |
|---|
| Sensors |
| Photodiode Power Sensors |
| Thermal Power Sensors |
| Thermal Position & Power Sensors |
| Pyroelectric Energy Sensors |
| Power Meter Consoles |
| Digital Handheld Console |
| Analog Handheld Console |
| Touchscreen Handheld Console |
| Dual-Channel Benchtop Console |
| Complete Power Meters |
| Power Meter Bundles |
| Wireless Power Meters with Sensors |
| Compact USB Power Meters |
| Field Power Meters for Terminated Fibers |
| USB Interfaces, External Readout |
光ファイバーパワーメータの特長
- InGaAs(PM20CとPM20CH)またはSi(PM20A)センサ
- 波長範囲
- 400 nm～1100 nm (Si)
- 800 nm～1700 nm (InGaAs)
- パワー範囲:
- PM20A用 -60 dBm ～ +16 dBm (1 nW～40 mW)
- PM20C用 -60 dBm ～ +13 dBm (1 nW～20 mW)
- PM20CH用 -50 dBm ～ +23 dBm (10 nW～200 mW)
- 交換可能なファイバーコネクタ
- ワイドキーFC/PC アダプタPM20-FCが付属
- FC/APC、SC、ST®、LC、SMAアダプタまたは Ø2.5 mmフェルール付きアダプタは別途ご注文ください
- W、dBm、dBで表示される絶対および相対測定
- 5 nmステップのNISTトレーサブル波長校正
- 1回の充電による操作時間：50時間
光ファイバーパワーメータPM20シリーズは、400～1700 nmの波長範囲と-60 dBmから +23 dBm(1 nW～200 mW)のパワー範囲をカバーする光ファイバ用途向けの丈夫でフル機能をもつ携帯型装置です。頑丈な筺体、内部センサ、およびスタンドが付いているので、現場や実験室での使用に適しています。
機能性
効率的な低消費電力回路によって、バッテリは長持ちします。8桁のLCDは、パワーの読み取りが簡単です。デバイスの操作はラベル表示されたキーパッドで行ないますので簡単です。本パワーメータは、波長設定、相対測定、パワー表示、および自動シャットダウン機能があります。PM20は充電可能な内蔵NiMHバッテリまたは付属のACアダプタから電力を供給します。ユニットにはFC/PCおよびFC/APCに対応のFCファイバーアダプタが付属します。殆どの工業規格ファイバーアダプタ(FC/APC、SMA、SC、ST、FCおよびLC)を簡単に取り付けてお使いいただけます。これらのアダプタは別途ご購入いただけます。フェルール用アダプタPM20-25(別売りです)は、2.5 mmフェルールをコネクタ無しで直接挿入することが可能です。なお、このパワーメータのセンサーサイズは2 mmと小さく、また本体にはポストに取り付けるためのネジ穴を配備していないため、FCアダプタを外して自由空間で使用する場合、検出部へのビームアライメントは難しくなります。自由空間のアプリケーションには、本体のポスト取り付け穴で位置の固定が可能であり、かつ受光サイズがØ9.5mmあるPM160シリーズのご利用をお勧めします。
各パワーメータには、センサ内蔵コンソール、FCファイバーアダプタ(FC/PCまたはFC/APCに対応)、12VDC電源(PMPS12)、Certificate of Calibration(校正証明書)、および操作マニュアルが付属します。
*ST®はLucent Technologies社の登録商標です。
| Power Meter Item # | PM20A | PM20C | PM20CH |
|---|---|---|---|
| Sensor Specifications | |||
| Optical Power Range | -60 dBm to 16 dBm (1 nW - 40 mW) | -65 dBm to 13 dBm (1 nW - 20 mW) | -50 dBm to 23 dBm (10 nW - 200 mW) |
| Spectral Range | 400 - 1100 nm | 800 - 1700 nm | |
| Detector Type | Silicon | InGaAs | |
| Sensor Size | 3.6 x 3.6 mm | Ø2 mm | |
| Input Aperture | 3.6 x 3.6 mm | Ø2 mm | |
| Aperture Thread | SM05 Thread (0.535"-40) for Fiber Adapters Fiber Adapter Included for FC Connectors (FC/PC or FC/APC) | ||
| Measurement Uncertainty | ±0.25 dB | ||
| Measurement Standard | NIST Traceable | ||
| Optical Damage Threshold | 50 W/cm² | ||
| General Console Specifications | |||
| Detector Compatibility | - | ||
| Display Type | Alphanumeric 8-Digits LCD | ||
| Display Format | 4 Digit Read Out with Units and Symbols | ||
| Power Units | dBm, dB, nW, µW, mW | ||
| Resolution | 14 bit | ||
| Sample Rate | 10 Hz | ||
| Dimensions (H x W x D) w/ Holster | 125 x 80 x 39 mm (4.9" x 3.1" x 1.5") | ||
| Weight | 0.2 kg (0.44 lbs) | ||
| Operating Temperature | 5 °C to 40 °C (Non-Condensing) | ||
| Storage Temperature | -20 °C to 70 °C | ||
| Power Management | |||
| Battery Operation | Internal NiMH Battery Pack, 150 mAh, 6 V | ||
| Operating Time | 50+ Hours | ||
| Shutdown | Manual, Auto 5 Minutes, or Auto 60 Minutes | ||
| Charger | 3-Hour Battery Charger Included | ||
| Charger Power Supply | Input: 90 - 264 VAC, 50 - 60 Hz; Output: 12 VDC @ 0.85 A | ||
パルスレーザ:パワーとエネルギーの計算
パルスレーザからの放射光が、使用するデバイスや用途に適合するかどうかを判断する上で、レーザの製造元から提供されていないパラメータを参照しなければならない場合があります。このような場合、一般には入手可能な情報から必要なパラメータを算出することが可能です。次のような場合を含めて、必要な結果を得るには、ピークパルスパワー、平均パワー、パルスエネルギ、その他の関連するパラメータを必要とすることがあります。
- 生物試料を損傷させないように保護する
- フォトディテクタなどのセンサにダメージを与えることなくパルスレーザ光を測定する
- 物質内で蛍光や非線形効果を得るために励起を行う
パルスレーザ光のパラメータは下の図1および表に示します。参照用として、計算式の一覧を以下に示します。資料を ダウンロードしていただくと、これらの計算式のほかに、パルスレーザ光の概要、異なるパラメータ間の関係性、および計算式の適用例がご覧いただけます。
計算式 | ||||
 | and |  | ||
 | ||||
 | ||||
 | ||||
平均パワーから算出するピークパワー、ピークパワーから算出する平均パワー : | ||||
 | and |  | ||
| 平均パワーおよびデューティーサイクルから算出するピークパワー*: | ||||
 | *デューティーサイクル( ) はレーザのパルス光が放射されている時間の割合です。 | |||
Click to Enlarge
図1: パルスレーザ光の特性を記述するためのパラメータを、上のグラフと下の表に示します。パルスエネルギ (E)は、パルス曲線の下側の黄色の領域の面積に対応します。このパルスエネルギは斜線で表された領域の面積とも一致します。
| パラメータ | シンボル | 単位 | 説明 | ||
|---|---|---|---|---|---|
| パルスエネルギ | E | ジュール[J] | レーザの1周期中に放射される1パルスの全放射エネルギ。 パルスエネルギはグラフの黄色の領域の面積に等しく、 これは斜線部分の面積とも一致します。 | ||
| 周期 | Δt | 秒 [s] | 1つのパルスの開始から次のパルスの開始までの時間 | ||
| 平均パワー | Pavg | ワット[W] | パルスとして放射されたエネルギが、1周期にわたって 均一に広がっていたと仮定したときの、 光パワーの大きさ(光パワー軸上の高さ) | ||
| 瞬時パワー | P | ワット[W] | 特定の時点における光パワー | ||
| ピークパワー | Ppeak | ワット [W] | レーザから出力される最大の瞬時パワー | ||
| パルス幅 |  | 秒 [s] | パルスの開始から終了までの時間。一般的にはパルス形状の 半値全幅(FWHM)を基準にしています。 パルス持続時間とも呼ばれます。 | ||
| 繰り返し周波数 | frep | ヘルツ [Hz] | パルス光が放射される頻度を周波数で表示した量。 周期とは逆数の関係です。 | ||
計算例
下記のパルスレーザ光を測定するのに、最大入力ピークパワーが75 mW
のディテクタを使用するのは安全かどうかを計算してみます。
- 平均パワー: 1 mW
- 繰り返し周波数: 85 MHz
- パルス幅: 10 fs
1パルスあたりのエネルギは、
と低いようですが、ピークパワーは、
となります。このピークパワーはディテクタの
最大入力ピークパワーよりも5桁ほど大きく、
従って、上記のパルスレーザ光を測定するのに
このディテクタを使用するのは安全ではありません。
| Posted Comments: | |
user
(posted 2024-03-29 16:32:54.717) I have a PM20C instrument, and I found that when using the instrument without the adapter, a certain value is measured. However, when the adapter is connected, the value decreases. What causes this? dpossin
(posted 2024-04-02 06:42:00.0) Dear customer,
Thank you for your feedback. I will reach out to you directly to discuss this with you. Jose Manuel Suarez
(posted 2023-10-04 10:49:25.067) Hi! I work in the optical lab at Royal Observatory of the Navy in San Fernando (Spain) and had an issue using this power meter. I had an OVERFLOW reading when measuring 515nm green light of around 20mW (measured also with PM100D power meter without problem). It is supposed that measuring range is up to 40mW, so it was strange.
Thanks in advance, regards. hkarpenko
(posted 2023-10-10 10:37:32.0) Dear Jose,
thank you for your feedback. I will contact you directly to discuss this issue with you. qiaozhanduo qiao
(posted 2023-02-15 00:15:13.913) 还有个问题需要咨询，脉冲激光器的平均功率在量程范围内时，脉冲峰值功率小于五倍的最大平均功率，探测器就是安全的吗？ hkarpenko
(posted 2023-02-16 07:48:56.0) Dear customer,
thank you for your feedback. In general you are right, the peak power and average power should be well under the power range of the sensor. Measuring pulsed laser sources with a photodiode can be challenging, since you would need a higher repetetion rate to measure the correct power. I will contact you directly to discuss this further with you. user
(posted 2022-12-01 13:14:02.81) We have a PM20A powermeter and want to use it to measure the light intensity (400-800 nm) coming out of a ferrule (the fiber has a 0.2 NA). What distance do you recommend between the ferrule and the sensor? And what is the optimal diameter the light beam must have on the sensor? hchow
(posted 2022-12-01 10:32:43.0) Dear Customer, thank you for your feedback. The distance between the ferrule while encapsulated in a FC/PC fiber adapter to the sensor's plane is 3.7 +/- 0.3 mm. If you remove the fiber adapter, then from the surface of the diode connector's surface to the sensor is 3.2 mm. While the beam diameter on the surface of the sensor is given by this equation: expanded beam at PD surface = 2*( 3.7*Tan(NA))+core size. Thank you. Francis Guay
(posted 2021-07-13 02:49:14.527) Does Thorlabs provide a calibration Service for this device? MKiess
(posted 2021-07-15 06:08:10.0) Dear Francis, thank you for your inquiry. Yes we offer calibration service for this fiber optic power meter. If you wish to do so, please send an e-mail with the article number and the serial number of the desired power meter to rma.de@thorlabs.com. Afterwards we will send you all further information for sending in the meter for calibration. If you have any further technical questions regarding calibration, please feel free to contact our Tech Support. dayana A
(posted 2019-10-22 14:37:04.1) Does Fiber Optic Power Meters have Built in Backlight feature ? dpossin
(posted 2019-10-24 08:47:59.0) Hello Dayana,
Thank you for your feedback! In case you mean a backlight for the display, unfortunately we currently do not offer this feature. Priya R
(posted 2019-10-21 22:45:44.04) Hi,
Is PM20CH integrated into a single unit for display and Keypad? MKiess
(posted 2019-10-25 09:31:06.0) This is a response from Michael at Thorlabs. The Thorlabs PM20CH is a complete, easy to use fiber-optic power measurement system with built-in optical sensor.
It has five operating keys and a display with which you can make all possible settings on the device itself. user
(posted 2019-04-15 10:14:54.383) Hi! We have recently bought a PM20CH power meter almost a month ago. Initially just to check the device it was working properly. But while doing the experiments and with its constant use it is found that if the battery is full it works fine when no charger is attached to it but the moment you plug the charger it shows a constant smudged display which seems to be CHARGING and the screen is fixed with it and one can't do any measurements.
What might be the reason for it?
The device is certainly under warranty period. swick
(posted 2019-05-15 03:32:15.0) This is a response from Sebastian at Thorlabs. The "charging" should disappear on the display after few seconds.
As you did not left contact details on this feedback, please contact your local Thorlabs Office for immediate help. user
(posted 2018-11-20 01:52:38.42) Hi!
Actually I have been trying to measure and verify the power of a fiber laser which has a power stability of 0.1 % with PM20 CH fiber optic power meter but the reading of the power meter fluctuates and is not providing a stable output power reading.
Can you please specify the stability of the power measured by this PM20CH power meter? nreusch
(posted 2018-11-28 05:51:35.0) This is a response from Nicola at Thorlabs. Thank you for your inquiry! I am sorry to hear that you are not able to get a stable output reading. Unfortunately, we only specify an absolute uncertainty of +/-0.25 dB. The stability and repeatability of the PM20CH are definitely lower than this value. As you did not leave any contact information, please contact your local Tech Support team to discuss wavelength, absolute power and extent of fluctuations you are observing to check whether your PM20CH shows a normal behavior. jan0dirk.lueuer
(posted 2018-08-26 13:17:06.387) Can this powermeter be used to measure short pulses (around 200 ns)?
We tried measuring powers (approx. 150 mW) and see a lot less power than we get using power heads. nreusch
(posted 2018-08-29 06:59:26.0) This is a response from Nicola at Thorlabs. Thank you very much for your inquiry. The PM20A contains a Silicon photodiode sensor. We do not recommend measuring nanosecond sources with this type of sensor. I will contact you directly to discuss alternative options. srikanth
(posted 2018-07-11 04:04:48.793) What are implications for power measurements FC/APC connected pigtails?
What are resolution (optical power) and linearity of the power meter?
Is the power meter calibrated over entire wavelength range in steps of 5nm?
LDT of 50W/cm^2 for (PM20CH) turns out to be ~32dBm; please confirm. swick
(posted 2018-07-13 05:26:30.0) This is a response from Sebastian at Thorlabs. Thank you for the feedback.
The linearity is +/- 0.5 % and the resolution depends on the power range but is basically 14 bit.
For using FC/APC connectors we recommend to use PM20-FC as fiber adapter.
The calibration step size is 5 nm over entire wavelength range.
The damage threshold is specified to be 50 W/cm² which is not necessarily equal to +32dBm because not the complete sensor size gets illuminated in most cases. This finally depends on the fiber type used. ana.cardenas
(posted 2018-06-19 13:50:16.06) We aquired a PM20CH and we would like to know if it is possible to get an adapter for free space measurements. mvonsivers
(posted 2018-06-21 08:05:20.0) This is a response from Moritz at Thorlabs. Thank you for your inquiry. The PM20 series is only designed for fiber coupled measurements, however, for free space beams the fiber adapter could just be removed. Dee1g12
(posted 2017-11-22 18:06:31.78) Can the charger be bought separately?
If so, how much do they cost?
Thanks,
Sincerely,
-David- mvonsivers
(posted 2017-11-27 08:42:52.0) This is a response from Moritz at Thorlabs. Thank you for your inquiry. Currently we do not offer a replacement power supply as standard product. However, any power supply with the following specifications can be used: 12V, 850mA, 2.1mm/5.5mm plug. I will contact you directly for further information. schaefer
(posted 2017-02-15 14:08:06.713) Hi! We have used a P20A unit for a long time and it seems like the battery has suffered quite a bit - after recharging it until 'battery is full' it takes only a couple of minutes until it says 'battery low' and with the AC plugged in there is a constant 'charging' text getting in the way of the actual measurement. Is there any way to replyce the battery or at least turn of the recharging message blinking? wskopalik
(posted 2017-02-21 03:16:46.0) This is a response from Wolfgang at Thorlabs. Thank you very much for your inquiry.
Yes, we can exchange the battery in these powermeters. I have contacted you directly to arrange the exchange. nicholas.sinclair
(posted 2014-08-21 08:36:54.13) Just a follow-up to the previous response about the active area of the PM20A. The specs on the webpage say 3.6 mm^2, but the manual says (3.6 mm x 3.6 mm), which is correct?
Since you mentioned the possibility of the beam being too large at the sensor, I'm curious what is the max acceptable NA for a single-mode fiber to avoid this issue (or if you could just tell me the approximate distance from the fiber tip to the sensor).
Thanks! shallwig
(posted 2014-08-22 10:04:06.0) This is a response from Stefan at Thorlabs. Thank you very much for your inquiry.The sensor size is like stated in the manual on page 10 3.6mm x 3.6mm http://www.thorlabs.com/thorcat/14100/PM20A-Manual.pdf I am sorry if the information on the website were confusing here. The distance between ferule and detector plane is 3,7 +/- 0,3mm.
I will contact you directly to discuss you application in detail. user
(posted 2014-04-17 17:17:37.477) Dear Tech-support,
could you please confirm if PM20A is compatible with standard 1mm POF (@650nm and 850nm)?
best regards
Michal shallwig
(posted 2014-04-25 04:12:55.0) This is a response from Stefan at Thorlabs. Thank you very much for your inquiry. To decide if a fiber is suitable we would need to know the NA and diameter, since it is possible to over illuminate the sensor. We specify the sensor size with 3.6 mm^2 active area. If the beam is larger, in the plane of the sensor, you will loose light and measure accuracy will be effected. Also, the damage threshold of the sensor may be an issue. We specify a damage threshold of 50 W/cm2.
If your fiber has one of the standard connectors, you can exchange the FC/PC adapter for one of the adapters we provide as accessories on our website: http://www.thorlabs.de/newgrouppage9.cfm?objectgroup_id=906.
Regarding the wavelength range, both 650nm and 850nm lie within the specified wavelength range of the built-in Si detector. To discuss in more detail the compatibility of your specific light source + fiber unit with our PM20A I will like to contact your directly. bdada
(posted 2011-12-13 11:59:00.0) Response from Buki at Thorlabs:
We have contacted you to get more information about your request. p_a_t_g
(posted 2011-12-13 09:32:37.0) Gentlemen
The power to put has function of guarded information jjurado
(posted 2011-03-22 10:43:00.0) Response from Javier at Thorlabs to anjonslay: Thank you very much for your interest in our products. A representative from our China sales office will contact you directly with pricing and availability information for our PM20C power meter. You can also reach this office via phone or e-mail:
Phone: +86 (0)21-32513486 or +86 (0)21-32513482
Email: chinasales@thorlabs.com anjonslay
(posted 2011-03-22 17:24:06.0) ??!
?????????????????????????:PM20C - Fiber Power Meter,?????:PM20-FC - FC Fiber Adapter Cap with internal SM05 Thread?????,????????????,???????????????!?????????????????????????????????????????!?????!??!
??????!
??/????/?????? deriksson
(posted 2009-12-28 09:27:01.0) PM20A passar utmärkt för att mäta effekten ur en laser diod med den effekt och vågläng som du vill mäta.
PM20A är lättanvänd och effekten läses ut direkt på displayen
Till PM20A finns dessutom olika fiber adaptrar under sectionen Accessories.
The PM20A will work perfect for measuring the power of the laser diode you want to measure.
The PM20A is easy to use and the power can be read directly on the display.
Different fiber connectors are available under the section Accessories mats
(posted 2009-12-27 13:19:08.0) Hej - jag jobbar med laserbehandlingar mot tunnhårighet. Vi vill nu jämföra lasrar på marknaden. Alla lasrar på denna marknad säger sig ge 5mW av 650nm våglängd. Dioderna är fastsatta på plattor så jag måste ha en bärbar enhet för att komma åt att mäta eller om det finns någon fiberadapter att sätta mot dioden och att mätinstrumentet står på ett bord bredvid.
Tror ni att ni har någon sådan produkt för oss? Det är inte superprecision jag är ute efter men absolut ingen leksak heller.
Mats Stolt 0701 910 110 - 08 20 00 18 technicalmarketing
(posted 2008-01-04 11:56:03.0) The PM20C does indeed come with a FC-adaptor. That item is available under the "accessories" section in case you need to purchase another one. The ST adaptor is avilable using the orer code (PM20-ST). Shortly, you will also see an LC adapter featured on this page (PM20-LC). We hope this information is helpful and apologize for the confusion. ruudg
(posted 2008-01-04 05:52:49.0) dear madam/sir
recently I have ordered a PM20C from you, plus some extra adaptors.
there is some small discrepancy here:
in the specs from the PM20C it says that it comes with an FC adaptor included, and that SC, ST and SMA can be ordered as extras. however in the list of extras you can only choose FC (again?) SC and SMA. can you please check with what standard adaptor the PM20C really comes and/or provide me with an ordering code for the ST-adaptor?
By the way, when will you be delivering the ordred PM20C?
regards,
ruud groenewegen.
royal nioz, netherlands. technicalmarketing
(posted 2007-10-08 10:39:42.0) Thank you for suggestion for this page. We now list power ranges in decibels as well as milliwatts. We hope this added information is helpful. acable
(posted 2007-10-05 20:30:24.0) Since we don't all think in dB can you also provide power range in units of mW. |
これらのアダプタは、当社のS15xCシリーズファイバーパワーメーターセンサ、ワイヤレス機能付きハンディパワーメータPM160、上記の光ファイバーパワーメータなどのSM05外ネジ付きの装置に取り付けられます。ワイドキーFC/PCファイバーアダプタPM20-FCは、上記の各パワーメータに付属しています。ナローキーとワイドキーコネクタの比較については光ファイバとはのページをご覧ください。
フェルール用アダプタPM20-25は、ロッキングコネクタ機構無しの設計になっています。Ø2.5 mmフェルール付きのファイバーパッチケーブルに対応し、パワーメータでの測定を迅速に行うことができます。
| Item # | PM20-FC2 | PM20-FC | PM20-APC2a | PM20-APCa | PM20-SMA | PM20-ST | PM20-SC | PM20-LC | PM20-25 |
|---|---|---|---|---|---|---|---|---|---|
| Adapter Image (Click the Image to Enlarge) |  |  |  |  |  |  |  |  |  |
| Connector Type | FC/PC, 2.0 mm Narrow Key | FC/PC, 2.2 mm Wide Key | FC/APC, 2.0 mm Narrow Key | FC/APC, 2.2 mm Wide Key | SMA | ST®b/PC | SC/PCc | LC/PC | Ø2.5 mm Ferrule |
| Threading | Internal SM05 (0.535"-40) | ||||||||
ズーム
Click for DetailsPMPS12用変換アダプタ(地域対応)
- PM20シリーズパワーメータ(上記参照)のための交換用ACアダプタ
- 出力電圧:12 VDC
- 入力電圧:90～264 VAC
- 地域対応の変換アダプタが付属
- UL、CEに準拠
PMPS12は12 VDC出力のACアダプタで、長さ1.8 mのケーブルと外径5.5 mmのDCコネクタが付いています。90～264 VACの入力電圧で動作し、最大出力電流は850 mAです。このACアダプタには地域対応の変換アダプタ(右の写真参照)が付属します。
ハンドヘルド型ファイバーパワーメータ