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Multimode 1x2 Couplers


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Multimode 1x2 Couplers

Common Specifications
Center Wavelength850 nm
Wavelength Range±40 nm
Ports1 x 2
Operating Temperature-40 to 85 °C (Unconnectorized Fiber)
20 to 70 °C (Connectorized Fiber)
Fiber Length1.0 m
Damage Threshold300 mW

Features

  • 50:50, 90:10, or 99:1 Coupling Ratios
  • Operating Wavelength: 850 ± 40 nm CW
  • Ø50 µm or Ø62.5 µm Graded-Index Fibers
  • Polarization Insensitive
  • Stocked Unterminated or with FC/PC Connectors
  • Alternative Terminations Available by Custom Order
  • Maximum Average Power: 300 mW
  • Contact Us for Custom Wavelength and Connector Options

Thorlabs offers an array of multimode 1x2 fiber couplers with Ø50 µm or Ø62.5 µm graded-index fibers operating at 850 ± 40 nm. These couplers are available with 50:50, 90:10, or 99:1 split ratios, either unterminated or terminated with FC/PC connectors. All splitters include Ø900 µm protective jacketing. Our multimode 1x2 couplers are fully bidirectional, allowing them to be used as couplers (combiners) or splitters. These multimode couplers offer low insertion loss and excellent environmental and mechanical stability, making them ideal solutions for combining and splitting signals in multimode fiber systems, such as monitoring optical signals with minimum loss. See the Chromatic Operation tab for information about using these couplers at other wavelengths.

Alternative Fiber Coupler Options

SM 2x2 CouplersSM 1x4 CouplersMM 1x2 CouplersPM 1x2 CouplersRGB Combiner

Thorlabs' multimode 1x2 couplers have a specified operating wavelength range of 850 ± 40 nm. However, the splitting ratio remains nearly constant over a much greater wavelength range, as shown in the plots below. Click here to download the coupling data shown below.

50:50 Multimode Coupler Chromatic Performance
90:10 Multimode Coupler Chromatic Performance
99:1 Multimode Coupler Chromatic Performance
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Posted Comments:
Poster: koreancarsg
Posted Date: 2013-02-14 14:38:45.63
May i know do Thorlabs have Single mode 1X2 fiber coupler with APC connectors and it's calculations? Rgds, Yingjie
Poster: jlow
Posted Date: 2013-02-14 09:30:00.0
Response from Jeremy at Thorlabs: We can make the couplers on this page with FC/APC connectors as a custom. We will get in contact with you regarding a quote for this.
Poster: jlow
Posted Date: 2012-11-12 16:49:00.0
Response from Jeremy at Thorlabs: The fiber used in the FCMM625-50A is the GIF625 (specs can be found at http://www.thorlabs.com/NewGroupPage9.cfm?ObjectGroup_ID=358&pn=GIF625). The Ge-doped core has a graded index profile and is Ø62.5µm. The cladding made from acrylate and is Ø125µm.
Poster:
Posted Date: 2012-11-09 10:13:34.19
Could you tell me the exact nature of optical core and optical clad for FCMM625-50A coupler ? Best regards,
Poster: bdada
Posted Date: 2012-03-13 13:43:00.0
Response from Buki at Thorlabs: Thank you for your feedback and product suggestion. Our production team has taken this on as a project and we would like to send you a sample. Please contact TechSupport@thorlabs.com to provide your contact information and additional information about your application. Thank you again for your feedback.
Poster:
Posted Date: 2012-03-12 15:23:58.0
Any chance you guys could offer step index 2X2 couplers with 50 um and 100 um cores.
Poster: bdada
Posted Date: 2012-02-10 15:09:00.0
Response from Buki at Thorlabs to awahba: Thank you for using our feedback forum. The specifications are valid dfor the operating temperature range of 20 to 70 degrees Celsius. Please contact TechSupport@thorlabs.com if you have any questions.
Poster: awahba
Posted Date: 2012-02-09 16:01:44.0
Hi. The catalog mentions very good mechanical and environmental stability. What is the variation over the temperature range? Thanks.
Poster: bdada
Posted Date: 2011-03-07 13:35:00.0
Response from Buki: Thank you for your feedback regarding our multimode fiber coupler. Unfortunately we do not have any data on the performance outside the operating wavelength range. In general, I would expect the coupling ratio to change and the insertion loss to increase at 488nm. Please contact us at TechSupport@thorlabs.com if you have further questions.
Poster: bmansel
Posted Date: 2011-03-07 03:03:46.0
Has there been any report on using this for 488nm? How is the splitting ratio? Any products being made with 50/50 split for 488nm?
Poster: Thorlabs
Posted Date: 2010-09-01 17:51:55.0
Response from Javier at Thorlabs to jukka.viheriala: we have not characterized the performance of our MM couplers at the 980 nm wavelength. However, the splitting ratio will most likely deviate significantly from its value at the center wavelength.
Poster: jukka.viheriala
Posted Date: 2010-08-31 06:40:34.0
Have you characterized splitting ratio and losses at 980 nm. I would need a coupler that makes roughly 50/50 to 10/90 splitting at 980 nm.
Poster: Adam
Posted Date: 2010-04-01 20:06:07.0
A response from Adam at Thorlabs: At this time we do not have an exact damage threshold specification for 3ns pulses. If we had more specifications about your laser, we may be able to determine how well the couplers will hold up. These couplers can withstand an average power of 300mW. I will email you directly to get extra information about your power specifications.
Poster:
Posted Date: 2010-04-01 11:34:02.0
Do you have any information about the intensity threshold for a 3ns pulse at 800nm? Thank you.
Poster: klee
Posted Date: 2009-10-15 18:09:39.0
A response from Ken at Thorlabs to jennifer.reiberkyle: It will transmit but we do not know what the split ratio will be. We can offer you a loan unit to test if you are interested. Please send your detail contact information to techsupport@thorlabs.com so that we can set up the loan for you.
Poster: jennifer.reiberkyle
Posted Date: 2009-10-15 16:48:18.0
Can this product be used with a 488nm-wavelength signal? If so, how would this affect the split ratio? If not, do you have any products that will work at 488nm? Thanks!
Poster: Tyler
Posted Date: 2008-06-03 15:33:48.0
A response from Tyler at Thorlabs to algomez: We don’t have a measurement of the insertion loss for the FCMM625-99A-FC, however, the insertion loss for the FCMM625-50A-FC is 4 dB when used with 850 nm light. The FCMM625-99A-FC should have nearly the same specification. It is possible to custom order a 2x2 MM fiber coupler but this requires the generation of a custom quote, which can be generated by supplying a member of our technical support team with the specifications of the desired component. Thank you for using our feedback forum.
Poster: algomez
Posted Date: 2008-06-03 11:53:02.0
Can you please tell me what the insertion/excess loss is on this graded index fiber 99:1 coupler? FCMM625-99A-FC Also, if you make these in house, is it possible to make the coupler a 2x2 instead of a 2x1? We would like to send 2 signals in, and 2 outputs. Thanks -Tony
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50/50 Split Ratio
50/50 Split Ratio
Zoom
Item #Coupling
Ratio		Insertion Loss
Path 1/Path 2
(dB)		Directivity
(dB)		Graded Index
Fiber Type
NATermination
FCMM50-50A 50/50 4.0 / 4.0 >35 GIF50C 0.200 ± 0.015 No Connectors,
Scissor Cut
FCMM50-50A-FC 50/50 4.0 / 4.0 >35 GIF50C 0.200 ± 0.015 FC
FCMM625-50A 50/50 4.0/4.0 >35 GIF625 0.275 ± 0.015 No Connectors,
Scissor Cut
FCMM625-50A-FC 50/50 4.0/4.0 >35 GIF625 0.275 ± 0.015 FC
Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Universal/Imperial Price Available / Ships
FCMM50-50A Support Documentation FCMM50-50A 1x2 MM Coupler, 50/50 Split Ratio, 50 µm GI Fibers, No Connectors $82.00
Today
FCMM50-50A-FC Support Documentation FCMM50-50A-FC 1x2 MM Coupler, 50/50 Split Ratio, 50 µm GI Fibers, FC/PC $122.00
Today
FCMM625-50A Support Documentation FCMM625-50A 1x2 MM Coupler, 50/50 Split Ratio, 62.5 µm GI Fibers, No Connectors $82.00
Today
FCMM625-50A-FC Support Documentation FCMM625-50A-FC 1x2 MM Coupler, 50/50 Split Ratio, 62.5 µm GI Fiber, FC/PC $122.00
Today
Add To Cart
90/10 Split Ratio
90/10 Split Ratio
Zoom
Item #Coupling
Ratio		Insertion Loss
Path 1/Path 2
(dB)		Directivity
(dB)		Graded Index
Fiber Type		NATermination
FCMM50-90A 90/10 12.0 / 1.5 >35 GIF50C 0.200 ± 0.015 No Connectors,
Scissor Cut
FCMM50-90A-FC 90/10 12.0 / 1.5 >35 GIF50C 0.200 ± 0.015 FC
FCMM625-90A 90/10 12.0 / 1.5 >35 GIF625 0.275 ± 0.015 No Connectors,
Scissor Cut
FCMM625-90A-FC 90/10 12.0 / 1.5 >35 GIF625 0.275 ± 0.015 FC
Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Universal/Imperial Price Available / Ships
FCMM50-90A Support Documentation FCMM50-90A 1x2 MM Coupler, 90/10 Split Ratio, 50 µm GI Fibers, No Connectors $82.00
Today
FCMM50-90A-FC Support Documentation FCMM50-90A-FC 1x2 MM Coupler, 90/10 Split Ratio, 50 µm GI Fiber, FC/PC $122.00
Today
FCMM625-90A Support Documentation FCMM625-90A 1x2 MM Coupler, 90/10 Split Ratio, 62.5 µm GI Fibers, No Connectors $82.00
Today
FCMM625-90A-FC Support Documentation FCMM625-90A-FC 1x2 MM Coupler, 90/10 Split Ratio, 62.5 µm GI Fiber, FC/PC $122.00
Today
Add To Cart
99/1 Split Ratio
99/1 Split Ratio
Zoom
Item #Coupling
Ratio		Insertion Loss
Path 1/Path 2
(dB)		Directivity
(dB)		Graded Index
Fiber Type		NATermination
FCMM50-99A 99/1 22.8 / 0.8 >35 GIF50C 0.200 ± 0.015 No Connectors,
Scissor Cut
FCMM50-99A-FC 99/1 22.8 / 0.8 >35 GIF50C 0.200 ± 0.015 FC
FCMM625-99A 99/1 22.8 / 0.8 >35 GIF625 0.275 ± 0.015 No Connectors,
Scissor Cut
FCMM625-99A-FC 99/1 22.8 / 0.8 >35 GIF625 0.275 ± 0.015 FC
Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Universal/Imperial Price Available / Ships
FCMM50-99A Support Documentation FCMM50-99A 1x2 MM Coupler, 99/1 Split Ratio, 50 µm GI Fibers, No Connectors $82.00
Today
FCMM50-99A-FC Support Documentation FCMM50-99A-FC 1x2 MM Coupler, 99/1 Split Ratio, 50 µm GI Fiber, FC/PC $122.00
Today
FCMM625-99A Support Documentation FCMM625-99A 1x2 MM Coupler, 99/1 Split Ratio, 62.5 µm GI Fibers, No Connectors $82.00
Today
FCMM625-99A-FC Support Documentation FCMM625-99A-FC 1x2 MM Coupler, 99/1 Split Ratio, 62.5 µm GI Fiber, FC/PC $122.00
Today
Add To Cart
Additional Fused Fiber Optic Couplers
  • 1 x 4 SM Couplers

  • SM 2x2 Fused Couplers/Taps

  • MM 1x2 Fused Couplers

  • PM 1x2 Fused Couplers

  • SM WDMs

  • PM WDMs

  • RGB Combiner

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