Superluminescent Diode (SLD)

Overview

The SLD is the optical source for FOGs. It is a key component that enables FOGs to achieve high sensitivity, low noise, high reliability, stability, and long service life.

This product is available in two versions: low polarization and high polarization. It offers stable output power, good spectral symmetry, and high reliability across the full temperature range. Manufactured using microelectronic and micro-optic processes, combined with advanced coupling and packaging technologies, it is offered with several fiber pigtail options, including high‑PER PM fiber, low‑PER single‑mode fiber, and high‑power versions. These options make it suitable for various types and accuracy grades of FOGs. Custom specifications and tailored technical solutions are also available upon request.

Beyond FOGs, the SLD is also used in biomedical imaging, fiber optic sensing, instrumentation, and other fields. It is housed in a standard butterfly 8‑pin hermetic package, and can be temperature‑controlled via external circuitry for long‑term stable operation.

Technical Specifications

High‑PER SLD

Category	Parameter	Symbol	Unit	Typical Value
Optical	Center Wavelength	λc	nm	1310 ± 20
	Spectral Width	BW	nm	≥ 30
	Output Power @100mA	P	µW	≥ 600
	Spectral Ripple	Ripple	dB	≤ 0.3
	Polarization Extinction Ratio	PER	dB	≥ 13
	Full‑Temp Power Variation	ΔP	%	≤ 3
Electrical	TEC Operating Current	ITEC	mA	≤ 700 (within full‑temp steady‑state operation)
	Max TEC Startup Current	ITmax	mA	≥ 1200 (for fast startup)
Package / Mechanical	Package Style	—	—	Butterfly 8‑pin
	Package Dimensions	—	mm	22 × 12.6 × 8.0
	Fiber Pigtail Type	—	—	PM / SM
	Fiber Pigtail Length	L	m	≥ 1.0
Environmental	Operating Temperature	Tw	°C	-45 ~ +70
	Storage Temperature	Ts	°C	-55 ~ +85

Low‑PER SLD

Category	Parameter	Symbol	Unit	Typical Value
Optical	Center Wavelength	λc	nm	1305 ± 15
	Spectral Width	BW	nm	≥ 35
	Output Power @100mA	P	µW	≥ 800	≥ 200
	Spectral Ripple	Ripple	dB	≤ 0.2
	Polarization Extinction Ratio	PER	dB	≤ 1
	Full‑Temp Power Variation	ΔP	%	≤ 3
Electrical	TEC Operating Current	ITEC	mA	≤ 700 (within full‑temp steady‑state operation)
	Max TEC Startup Current	ITmax	mA	≥ 1200 (for fast startup)
Package / Mechanical	Package Style	—	—	Butterfly 8‑pin
	Package Dimensions	—	mm	22 × 12.6 × 8.0
	Fiber Pigtail Type	—	—	PM / SM
	Fiber Pigtail Length	L	m	≥ 1.0
Environmental	Operating Temperature	Tw	°C	-45 ~ +70
	Storage Temperature	Ts	°C	-55 ~ +85