1550nm Broadband Faraday Rotator Mirror

Faraday Rotator Mirrors (FRMs) are used in a number of fiber optic applications, including interferometric sensor systems. In general, FRM performance parameters are specified over a central wavelength and narrow temperature range. This means that the rotation angle will change over wavelength and temperature.

Lightel now offers a compact form factor, broadband FRM (BBFRM) that rotates the light 45 degrees (single pass) over a wavelength range of 1550 nm ± 30 nm, and a temperature range of -20°C to +70°C. With a constant rotation angle within this bandwidth and operating temperature range, the broadband FRM can reduce noise dramatically for interferometric sensor systems.

Center Wavelength1550 nm
Bandwidth± 30 nm
Insertion Loss≤ 1.0 dB
Faraday Rotation Angle (single pass, within
the bandwidth & operating temperature range)
45 ± 0.5°
Extinction Ratio (PM)≥ 20 dB
PDL (SM)≤ 0.05 dB
Maximum Power300 mW
Operating Temperature-20°C ~ +70°C
Storage Temperature-40°C ~ +85°C
Package Dimensions5.0 mm (Φ) x 20 mm (L)

Note 1: All values specified are without connectors.
Note 2: SM fiber type: SMF-28e or compatible fiber.
Note 3: PM fiber type: PM 1550 Panda fiber.
Note 4: Other wavelengths available upon request. .

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