Polarization Maintaining Fiber Splitter (PMFS)

Overview

Polarization Maintaining Fiber Splitter (PMFS) is one of the key optical components in polarization-maintaining optical systems such as fiber optic gyroscopes (FOG) and fiber optic current transformers (FOCT). Its function is to achieve precise splitting and combining of polarized light, ensuring high polarization-maintaining characteristics, low polarization noise, low power noise, and good wavelength dependence in optical transmission for FOG and similar applications. It features low WDL (Wavelength-Dependent Loss), low PDL (Polarization-Dependent Loss), wide operating temperature range, and wide wavelength range.

The product is manufactured using mature batch-processing technologies and advanced coupling and packaging technologies, offering advantages such as strong environmental adaptability, excellent performance, and suitability for mass production. It is available in various fiber configurations, including full polarization-maintaining (PM) fiber and hybrid PM/singlemode fiber pigtail options.

Technical Specifications – 1310nm PMFS

Category	Parameter	Symbol	Unit	Typical Value
Optical	Operating Wavelength Range	λw	nm	1310 ± 40
	Splitting Ratio	D	—	45:55 ~ 55:45
	Full-Temperature Splitting Ratio Variation	ΔD	%	≤ 2
	Excess Loss	IL	dB	≤ 0.7
	Temperature-Dependent Loss	TDL	dB	≤ 0.2
	Polarization-Dependent Loss	PDL	dB	≤ 0.15
	Wavelength-Dependent Loss	WDL	dB	≤ 0.1
	Polarization Extinction Ratio	PER	dB	≤ -22 (full-temp ≤ -18)
	Directivity	Dir	dB	≥ 55
	Return Loss	RL	dB	≥ 50
Mechanical	Device Dimensions	—	mm	φ4.5 × 26
	Fiber Pigtail Type	—	—	PM / SM
	Fiber Pigtail Length	L	m	1.2
Environmental	Operating Temperature	Tw	°C	-45 ~ +70
	Storage Temperature	Ts	°C	-55 ~ +85

Technical Specifications – 1550nm PMFS

Category	Parameter	Symbol	Unit	Typical Value
Optical	Operating Wavelength Range	λw	nm	1550 ± 40
	Splitting Ratio	D	—	45:55 ~ 55:45
	Full-Temperature Splitting Ratio Variation	ΔD	%	≤ 2
	Excess Loss	IL	dB	≤ 0.7
	Temperature-Dependent Loss	TDL	dB	≤ 0.2
	Polarization-Dependent Loss	PDL	dB	≤ 0.15
	Wavelength-Dependent Loss	WDL	dB	≤ 0.1
	Polarization Extinction Ratio	PER	dB	≤ -22 (full-temp ≤ -18)
	Directivity	Dir	dB	≥ 55
	Return Loss	RL	dB	≥ 50
Mechanical	Device Dimensions	—	mm	φ4.5 × 26
	Fiber Pigtail Type	—	—	PM / SM
	Fiber Pigtail Length	L	m	1.2
Environmental	Operating Temperature	Tw	°C	-45 ~ +70
	Storage Temperature	Ts	°C	-55 ~ +85