In-Line Fiber Partial Reflector
- Partial Reflectors with Internal Reflective Coating
- 1450 nm - 1650 nm Wavelength Range
- 67:33 or 10:90 Reflection Ratio (R:T)
- Available with FC/PC or FC/APC Connectors
10:90 Partial Reflector with FC/APC Connectors
67:33 Partial Reflector with FC/PC Connectors
- Partial Reflectors for In-Line Fiber Applications
- Internal Reflective Coating with 67:33 or 10:90 Reflection Ratio (R:T)
- 1450 nm - 1650 nm Wavelength Range
- Available with 2.0 mm Narrow Key FC/PC or FC/APC Connectors
Thorlabs’ In-Line Partial Reflectors are designed to partially reflect the input light; a portion is reflected back towards the input end while another fraction is transmitted to the output. This is achieved by splitting the input light and using an
These partial reflectors have a 1450 nm - 1650 nm single mode wavelength range with either a 67:33 or 10:90 reflection ratio. The reflection ratio
Each partial reflector includes two protective caps that shield the ferrule ends from dust and other hazards. Additional CAPF Plastic Fiber Caps and CAPFM Metal Threaded Fiber Caps for FC/PC- and FC/APC-terminated ends are also sold separately. Mating sleeves are available to couple patch cables together and serve to minimize back reflections and ensure proper alignment of the cores of each connected fiber.
*Hytrel® is a registered trademark of DuPont Polymers, Inc.
Click to Enlarge
Figure 1: All-Fiber Beamsplitter Setup
Fiber partial reflectors are useful in creating a variety of devices such as beamsplitters, laser cavities, and interferometers. These fibers reflect a fraction of the light back down the fiber, transmitting the remainder through the output fiber connector.
This property is especially useful for creating an all-fiber beamsplitter; the user can split a light source without requiring free space coupling using a beamsplitter cube. Figure 1 shows this simple setup made up of a fiber circulator and a 67:33 fiber partial reflector. Light is input into Port 1 of the circulator, with the partial reflector coupled to Port 2. The input light is coupled from Port 1 to Port 2; roughly 33% of the light is transmitted through the fiber output, and the remainder is reflected back towards the input and directed towards Port 3 by the circulator.
Brent Carlson  (posted 2022-10-31 13:56:52.023)
Hi, I've purchased and I'm testing the RW1550R3F partial reflector. Maybe I missed it, but I'm wondering what its polarization properties are for the reflected signal. Is it Faraday mirror and reflects at 90 deg? Does it reflect at the same pol as the incident signal? Is it arbitrary? Is the reflected signal depolarized? Any insight/help would be greatly appreciated.
jgreschler  (posted 2022-11-01 03:51:59.0)
Thank you for reaching out to Thorlabs. The In-Line Fiber Partial Reflectors use single mode fiber, the phase and polarization of the reflected and transmitted signals will have no relationship after exiting the fiber, only relative intensity.
user  (posted 2021-07-06 10:51:45.783)
For the In-Line Fiber Partial Reflectors, the notes say it cannot be used in the reverse direction. But what happens when light does enter in the reverse direction? For example, is it very lossy? Thanks
YLohia  (posted 2021-07-07 02:58:45.0)
Thank you for contacting Thorlabs. This product is essentially a 2x2 coupler, except that one output has a highly reflective coating, and the second input is internally terminated. The end product is a 1x1. Therefore, the losses will be quite high when being operated in reverse.
Simon Boiviner  (posted 2019-06-18 11:40:52.16)
Hi, Have you any PM version of RW1550R3A component ? Reagrds, Simon
YLohia  (posted 2019-06-20 08:43:47.0)
Hello Simon, thank you for contacting Thorlabs. Quotes for custom items can be requested by emailing email@example.com. I have reached out to you directly to discuss the possibility of offering this.
masahiro.watanabe.ub  (posted 2017-02-22 10:57:16.757)
Selection of the reflectance should be allowed. Only R = 67% is not useful. I am looking for inline partial reflector with R = 4%. R = 10% and 33 % would also be useful.
tfrisch  (posted 2017-03-02 02:10:01.0)
Hello, thank you for sharing your feedback on what other ratios would be useful. I will reach out to you directly about our custom capabilities until we release more versions to our stock.
|Item #a||Info||Center Wavelength||Bandwidth||Reflectanceb (Click for Plot)||Transmissionc (Click for Plot)||Reflection Ratiod||Fiber Typed||Termination|
|RW1550R3F||1550 nm||±100 nm||45.0 ± 4.5%
(3.5 ± 0.4 dB)
|22.5 ± 2.5%
(6.5 ± 0.5 dB)
|Item #a||Info||Center Wavelength||Bandwidth||Reflectanceb (Click for Plot)||Transmissionc (Click for Plot)||Reflection Ratio||Fiber Typed||Termination|
|RW1550R2F||1550 nm||±100 nm||7.2 ± 2.7%
(11.4 ± 2.0 dB)
|65.0 ± 5.0%
(1.9 ± 0.1 dB)