The stabilization modules for distributed feedback (DFB) lasers are another common application for fiber Bragg gratings (FBGs). The pump laser stabilizer acts as a reflective mirror outside the pump laser module. It reflects a small portion of light back to the laser diode cavity, inducing a laser emission at the desired wavelength. The spectrum of the FBG stabilizer can be customized to fit the best performance of the laser output. This is particularly applicable to pump lasers for 980nm and 1480nm Erbium-doped fiber amplifiers (EDFAs), as well as DWDM modules for the 1300 nm and 1550 nm bands. Wavelength lockers can be produced at wavelengths such as 1064 nm, even with polarization-maintaining (PM) fiber.

--High wavelength accuracy        

--High reliability

--Highly resistant to electromagnetic interference

--Small size and weight            

--Excellent long-term stability

--Laser diode wavelength locker       

--Resonators for Raman fiber lasers

--DFB laser stabilization for DWDM application   

--Tuneable laser modules

Specification of Wavelength Locker

Parameters	Specifications	Tolerance
Center wavelength	970-980nm, custom	±0.3nm
FWHM	0.1~1.2 nm	±0.1nm
Reflectivity	2%-90%	±1~5%
SMSR	>10 dB, >15 dB, custom
Pigtail length	Custom
Fiber type	HI1060,HI980,PM980,SMF-28,custom
Proof test level	>150 kpsi
Operating temperature	-20℃~75℃
Termination	Bare fiber, FC/PC, FC/APC, SC/PC,SC/APC

Raysung photonics,located in the export processing zone of Xi'an, China,is specialized in manufacturing FBG, lensed fiber and FBG filter for FTTH. Besides these three main products, Raysung can aslo manufacture wavelength stabilizer and DWDM FBG filter, chirped fiber grating, long period grating, custom fiber grating and so on. In addition, Raysung has ability to develop and produce special gratings for sensor. The compay is committed to the research, design and producing of these products and it is one of the only manufactures which has the capacity to volume- producing all sorts of fiber grating in China. Moreover,Raysung is one of the only manufactures in the world who has the capacity to manufacture the type of optical fiber which incorporates FBG and lensed fiber. Raysung's products are widely used in aerospace,construction industry,coal industry,etc. The company's professional teams have rich experience in photoelectric area and it uses advanced technology and equipment. This allow them to provide their customers with high-quality products and optimized proposals.