- GI50/125 or GI62.5/125 fibers
- UV to IR wavelength range
- high directivity
- mode insensitivity
- stable coupling ratio
- high reliability
- low insertion loss
- custom configurations available
1x2 high directivity fiber optic multimode couplers
SEDI-ATI’s high directivity multimode couplers are ideal for optical metrology and sensing applications where the dynamic range of the sensor is a key parameter.
Indeed, for these types of applications, high directivity is a fabulous advantage! Actually, high directivity is essential to minimize the light that can pass directly from the injection port of the 1×2 coupler (port 1: light source) to the detection port (port 2: detector).
In a round trip configuration (depending on the launch condition), the insertion loss from port 1 to port 2 is < 6.5 dB with a total reflection at the common port 3. This way a minimal mismatch between the input and the reflected signal is achieved!
Besides, the main other benefits of SEDI-ATI’s high directivity fiber-optic multimode couplers are mode insensitivity and achromaticity.
These couplers can be manufactured with any Graded Index fiber types such as GI50/125 μm with directivity as high as > 55 dB or GI62.5/125 μm with directivity as high as > 45 dB.
In addition, for high-power UV applications, we have developed the HDS series which can handle as much as 2 W @ 420 nm.
Finally, our high directivity fiber-optic multimode couplers are also available with different coupling ratios and fiber lengths upon request.
Please contact us to discuss your specific requirements.
CP-HDPort configuration1x2Coupling ratio50/50Fiber lengths on each port50 cmFiber typeGI 50/125 μmGI 62.5/125 μmDirectivity> 55 dB> 45 dBUniformity0,7 dBInsertion loss*< 3,7 dBHandling power100 mW@980 nmOperating wavelength range532 -1625 nmOperating temperature range-20°C to +70°CStorage temperature range-40°C to +85°C
CP-HDSPort configuration1x2Coupling ratio50/50Fiber lengths on each port50 cmFiber typeGI 50/125 μmDirectivity> 55 dBUniformity1,0 dBInsertion loss*< 4,2 dBHandling power2 W@420 nmOperating wavelength range400 -1625 nmOperating temperature range-20°C to +70°CStorage temperature range-40°C to +85°C