マイケルソン型干渉計モジュール

Compact OCT Proven Michelson-Type Interferometer
Low Insertion Loss
Flat Wavelength Response
Input for Alignment Laser

INT-MSI-1300B

Power Supply Included

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概要
ピン配列
動作原理
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Item #	INT-MSI-1300	INT-MSI-1300B
Optical
Interferometer Wavelength Range	1250 - 1350 nm
Fiber Type	SMF-28e+
Input/Output Port	FC/APC
Insertion Loss^a from 1300 nm IN to Sample Arm and to Reference Arm	< 4.2 dB (Typical) 5 dB (Max)
Insertion Loss^a from 660 nm IN to Probe	< 3 dB (Typical) 4.5 dB (Max)
Path Length Difference	< 0.1 mm (Typical) 0.2 mm (Max)
Electrical
Detector Material/Type	InGaAs/PIN
Detector Wavelength Range	800 - 1700 nm
Typical Responsivity (Max)	1.0 A/W
Output Bandwidth (3 dB)	DC - 15 MHz	DC - 100 MHz
Transimpedance Gain^b	51 kV/A	100 kV/A
Saturation Power	70 µW	35 µW
Maximum Input Power	20 mW
Electrical Output	SMA
DC Offset	< ±5 mV
Power Supply	±12 V @ 250 mA (100/120/230 VAC, 50 - 60 Hz, Switchable) (PICO M8 Connector)
General
Dimensions	4.72" x 3.15" x 0.827" (120 mm x 80 mm x 21 mm)

中心波長にて測定された入出力ピグテールのコネクタ損失を含む
トランスインピーダンス利得は、高インピーダンス負荷を使用した際の出力に対応しており、50Ωのインピーダンスでは半分の値

特長

偏光状態に依存した分岐比(PDCR)のバラツキが最小
アクティブエイリアシングフィルタ付きの差分ディテクタが組み込まれた製品
アライメント用のガイド光(660 nm)の入力ポート
電源付属

このマイケルソン型干渉計モジュールINT-MSI-1300とINT-MSI-1300Bは、1250～1350 nmの波長領域に対応した差分検知機能のあるOCTシステム用に設計されています。高速の掃引レーザをサポートするために、INT-MSI-1300Bの内蔵ディテクタの帯域幅は100 MHzと広くなっています。このモジュールには、マイケルソン型干渉計対応の光ファイバ回路が内蔵されており、参照アームとサンプルアーム用の出力ポートがあります。 INT-MSI-1300 と INT-MSI-1300B の違いは、上述した帯域幅や、トランスインピーダンス利得、および飽和出力のみが異なります。詳しくは右の表をご覧ください。

波長依存性と偏光依存性が非常に低い最適化された分岐カプラを内部で使用しています。ファイバ長は、干渉計の両方のアームで0.2 mmの公差の範囲内でそろえられ、筺体には、構造の安定性と利便性のためにFC/APCの角度付きファイバーアダプタが採用されています。デジタルフリンジ信号中のエイリアシング周波数は画像品質を劣化させるので、その生成を抑制するために、内蔵の高利得差分ディテクタはアクティブエイリアシングフィルタを含んでいます。

INT-MSI-1300とINT-MSI-1300Bから光学系に向けた入射光のアライメントをサポートするために、660 nm のガイド光のレーザと共に、掃引レーザ光源(1300 nm)とガイド光(660 nm)を結合する特別設計のWDMカプラがモジュールに内蔵されています。

パワーモニタ出力

SMAメス

SMA Female

0 - 1.8 V (50 Ω) or 0 - 3.6 V (High Z)

図1は、タイムドメインOCTシステムにINT-MSI-1300Bを用いた例。中心波長が1300 nmの広帯域光源からの光は、サーキュレータと50/50 のカプラを通過します。干渉計のサンプルアームと参照アームからの後方反射光は、50/50カプラで結合され、干渉縞信号を生成します。干渉縞信号はサーキュレータとWDMカプラを通過し、差分ディテクタに入力されます。差分ディテクタからの出力信号は、データ取り込み装置に取得された後にデータ処理されて、OCT画像の再構成に利用されます。図2は、周波数ドメインOCTシステムにINT-MSI-1300Bを組み込んだ例です。ここでは、参照アームの終端部にある移動ミラーを固定ミラーに差し替えています。

Schematic of INT-MSI-1300 in Time Domain Setup

図1: タイムドメインOCTシステムでINT-MSI-1300Bを用いた概略図

Schematic of INT-MSI-1300 in a Fourier Domain Set Up

図2:フーリエドメインOCTシステムでINT-MSI-1300Bを用いた概略図

ファイバ長は、干渉計の両方のアームで0.2 mm の公差の範囲内でそろえられ、その一方で適切な雑音低減(最大コモンモード除去比CMRR) を実現するために、50/50カプラと差分ディテクタの入力部の光路もそろえられます。波長依存性と偏光依存性が非常に低い最適化された分岐カプラを内部で使用しています。この結果、検知された信号は、ほとんど入射光の偏光状態の変化の影響を受けなくなります。図3は、参照アームポートとサンプルアームポートにおける入射パワーのパーセンテージを表します。1300 nm (中心波長)で測定されたときに、両方のポートにおいてパワーが等しくなることが確認できます。

Graph of INT-MSI-1300 coupling

図3:波長が1300 nm のとき、INT-MSI-1300Bにおける入力ポートからサンプルポートと参照ポートまでの結合効率

Posted Comments:

Ela Öztürk (posted 2023-10-20 03:52:47.35)

Hi, can I learn the information about this product's displacement resolution, velocity resolution, acceleration resolution and sensor resolution, if you have data?

dpossin (posted 2023-10-23 08:33:49.0)

Dear Elanur, Thank you for your feedback. The INT-MSI-1300 is a fiber-based Michelson interferometer and has an analog output. If used in an OCT system, the resolution of the complete system, would be dependent on the setup and all components used.

Nathan Eschbach (posted 2022-04-13 13:38:56.127)

I am confused by the diagram and description for the operating principle here. If the mixed single is mixed in a 50/50 after the sample is probed, and then each arm of that 50/50 goes to each input of the balanced detector, then the balanced detector is receiving the exact same signal at each input and there is no comparison to be made. Can someone please comment on this?

fmortaheb (posted 2022-04-25 05:26:02.0)

Dear Nathan, Thank you very much for your feedback. I will contact you directly to discuss the operating principles in more detail.

marc miousset (posted 2020-03-16 18:12:49.083)

Hi, I would like to test INT-MSI-1300B with laser diode in Input OCT Laser, LPSC-1310-FC (not OCT). Do you tkink it will be OK (the SLD DIODE are to expensive). Thank You Marc

MKiess (posted 2020-03-18 10:35:16.0)

This is a response from Michael at Thorlabs. Thank you very much for the inquiry. In general, you can also use the input with other lasers. The laser you use, depends on your exact application. However, note that the laser you mentioned has FC/PC connectors, while the input of the INT-MSI-1300B has FC/APC connectors. I have contacted you directly to discuss your application, possible alternatives or special designs.

Minsuk Lee (posted 2020-02-11 21:07:26.027)

Can you specify the electrical delay of the system? I am trying to calculate the optimized k-trigger delay time of the swept-source laser for the OCT system. Best regards, Minsuk Lee

MKiess (posted 2020-03-02 05:12:21.0)

This is a response from Michael at Thorlabs. Thank you very much for the inquiry. The electrical propagation time between detector and output socket (RF port) is negligible. This time results only from a few centimeters of conductor paths with an amplifier. Approximately one can say that the electrons are as fast as light. At 10 cm that makes about 0.5 ns. In general, the difference in optical propagation time, depending on the experimental setup, is the more significant. Of course this depends strongly on the experimental setup. The INT-MSI box causes a delay of about 9.2 ns, whereby this value does not take into account the propagation time between the INT-MSI box and the sample. I have contacted you directly to discuss this in more detail.

Erick Ulin Avila (posted 2020-01-23 13:49:17.437)

need to know the operating and storage temperaturas. Thanks in advance

MKiess (posted 2020-01-27 04:45:25.0)

This is a response from Michael at Thorlabs. Thank you very much for the inquiry. The operating temperature range is 0°C to 40°C, whereas the storage temperature range is from -40°C to 70°C.

syhamadani (posted 2017-01-19 18:57:48.58)

Can this product (or the Mac Zhender) be used in a FROG system (or other autocorrelation interferometric system) to measure the pulsewidth of picosecond fiber lasers (0.1 to 5 psec)?

wskopalik (posted 2017-01-20 03:56:28.0)

This is a response from Wolfgang at Thorlabs. Thank you very much for the inquiry. I will contact you directly to discuss your requirements and to provide further assistance.

bass_1526 (posted 2017-01-12 01:20:11.433)

Hello, I have a cuestión about what kind of accessories I need to buy if I want to use the Michelson OCT interferometer for to preforme measured in domino time... specific for the measure micro-displacements... Specifically for the reference arm. Thanks

swick (posted 2017-01-12 06:18:27.0)

This is a response from Sebastian at Thorlabs. Thank you for the inquiry. A schematic setup for the Time-Domain design and the Fourier-Domain design can be found on tab "Operating Principles". I will contact you directly for further assistance.

marino.biom (posted 2015-01-27 11:59:11.19)

Hello, Can I use this interferometer for a SD-OCT setup, in 1300 nm range? In thise case, how works the detection system? Need I to buy a spectrometer? Thanks in advance Best regards

shallwig (posted 2015-01-28 06:27:39.0)

This is a response from Stefan at Thorlabs. Thank you very much for your inquiry. This Michelson Type interferometer is not suitable for SD-OCT applications. From its working principle with the built in balanced detectors which are used for detecting interference fringes these interferometers are a subassembly to be used in both swept source Fourier domain and time domain OCT systems. For spectral Domain (SD) OCT you need a spectrometer to measure the interference signal as function of wavelength. I will contact you directly to discuss your application and your needs in detail.

fixed-term.Ahmad.Sabbagh (posted 2013-10-14 15:57:52.777)

Hello, we have a special made interferometer without the DC components. First testings seems to be Okay, but we found out that we have much noise in the sample and reference arm. The sensitive fiber cable in these arms effects the output, there must be polarisations which makes these interferometer useless for our project. Can you explain this phenomena maybe. The polarisation comes after the circulator ? We are not sure from where. To find a way to solve it we need more informations on that. Thank you! Best regards. Ahmad Sabbagh Robert Bosch GmbH Stuttgart Feuerbach

tschalk (posted 2013-10-24 04:41:00.0)

This is a response from Thomas at Thorlabs. Thank you very much for your inquiry. It is important that you measure the polarization in the sample and reference arm. The polarization effects inside the interferometer should not cause that much noise. I will contact you directly to discuss your application.

tschalk (posted 2012-12-13 09:28:00.0)

This is a response from Thomas at Thorlabs. Thank you very much for your inquiry. Although we are not able to share information about the electronics in the equipment we will be happy to discuss your needs and work together to produce a modified version that would be suitable for your application. If that would be an interesting option for you we can discuss the modifications that would be required. I will contact you directly for more detailed information.

avle (posted 2012-12-13 03:05:10.203)

hi there, could you share the electrical schematic for the balanced detector used in the unit? We'd like to make some modifications to it. Thanks!

bdada (posted 2012-02-24 15:40:00.0)

Response from Buki at Thorlabs to avle: Thank you for your feedback. We will contact you with more information and post an update here soon.

avle (posted 2012-01-26 03:16:24.0)

Hi there, what is the max sweep rate for the swept source laser that can be used with the 100mhz version of the unit? How would one go about calculating the frequency bandwidth required for the detector based on sweep frequency of the swept source laser? Thanks!

bdada (posted 2011-10-17 12:41:00.0)

Response from Buki at Thorlabs: Thank you for using our feedback tool. The power supply used is the LDS1212-1 and the description is Power Supply, ±12 VDC, 6W, 115/230 VAC. It is not available on our website but you can purchase it by calling or emailing our Sales Department at 973 300 3000 or sales@thorlabs.com.

yubo.duan (posted 2011-10-17 06:59:57.0)

Dear Sir/Madam, We bought INT-MSI-1300B before. Now its power supply is broken by accident. We want to buy a new one, but I didn't find how to order the power supply individually online. Also I didn't find the same one in the local electronic trade counters. Could you help me please? I'm in Singapore. Thanks a lot. Best wishes. - Duan Yubo

jjurado (posted 2011-08-15 12:15:00.0)

Response from Javier at Thorlabs to avle: Thank you very much for contacting us. We offer a variety of table clamps and kinematic stops that you can use in order to secure the interferometer onto the bottom of your optical table. Take a look at the links below: http://www.thorlabs.com/NewGroupPage9.cfm?ObjectGroup_ID=191 http://www.thorlabs.com/NewGroupPage9.cfm?ObjectGroup_ID=176 I will contact you directly for further support.

avle (posted 2011-08-15 01:56:00.0)

hi there, what would be the cost to get a replacement cover for the interferometer that would allow it to be bolted to an optical breadboard. Having this feature for future products would be highly useful. Thanks!

jjurado (posted 2011-06-16 11:50:00.0)

Response from Javier at Thorlabs to avle: Thank you very much for submitting your inquiry. We will contact you directly to assist you with your application.

avle (posted 2011-06-15 16:38:33.0)

We have purchased this unit and are testing it with our swept source laser. We are having some issues getting fringe outputs from the unit. With the reference arm aligned, i see the a waveform output that corresponds to the power vs time output of the laser. Should I be seeing this, or some actual fringes? Also, I am having a hard time using the F280APC-C fiber collimators to get aligned. Are these more sensitive/harder to align generally? When I switch to a GRIN based collimator it seems easier to align. Also regarding the use of a neutral density filter, what optical density would you recommend? Some help on getting started would be great! Thank you! ~Anthony

klee (posted 2009-10-08 18:02:51.0)

A response from Lina at Thorlabs to mo_kamal: Thank you for your interest in Thorlabs products in particular our OCT system components. In regards to your questions, you can use the Michelson interferometer with the Swept Source laser. From your email it seems like you are planning to build an OCT system, for that we recommend the balanced detectors that then will be connected to the NI card. Below you can see the link for the detector: http://www.thorlabs.com/NewGroupPage9.cfm?ObjectGroup_ID=2151 You might as well take a look at other OCT components that you might require for your set up: http://www.thorlabs.com/navigation.cfm?Guide_ID=902 We also sell complete OCT system ready to use: http://www.thorlabs.com/NewGroupPage9.cfm?ObjectGroup_ID=2098

mo_kamal (posted 2009-10-08 15:40:47.0)

Hi Can we use it for OCT imaging with Thorlabs SLD1325 light source? Do we need any camera? Or we can just plugin NI data acquisition card for data acqusition? if camera is required what kind of camera recommonded? can we buy them from Thorlabs? Thanks Kamal

mo_kamal (posted 2009-07-14 12:45:00.0)

1. INT-MSI-1300 - Michelson-Type Interferomete would be useful for 1000nm centre wavelength with a spectral bandwidth of 200nm for OCT application.... 2. What kind of detector/ data acquisition card recommonded with this types of inteferometer for OCT

Tyler (posted 2009-04-29 14:41:47.0)

A response from Tyler at Thorlabs to nmorel: The fiber coupler element found inside the Michelson-Type Interferometer would have a much narrower bandwidth (~20 nm) for an interferometer with a central wavelength of 830 nm. Is this acceptable for your application? Thank you for your inquiry.

nmorel (posted 2009-04-27 09:39:09.0)

you have a INT-MSI-1300 - Michelson-Type Interferomete in 830 nm ???