Where can the narrow bandwidth FBG be used?
The narrow-bandwidth FBG products can substitute for the TFF in DWDM system,OXC and OADM devices. Moreover, It is proved that this kind of FBG can be used as a fiber grating sensor for distributed demodulation system, which will improve the bandwidth availability of light source in the distributed sensing systems, increase the number of sensing Bragg grating, eliminate the cross-effect between signals, and reduce the cost of the demodulation system.

Advangtages:
The narrow bandwidth of Fiber Bragg grating has the advantage of low insertion loss, low polarization dependent loss , strong anti-interference ability, easy to optical fiber fusion, center wavelength precisely controlled, etc., compared with narrowband thin-film filter (TFF), process more simple and lower cost.

In the application of DWDM

In dense wavelength division multiplexing (DWDM) communication system,  narrow channel bandwidth and low channel spacing are needed,its better to have more channel multiplexing/solution multiplexer (Mux/Demux),While traditional multiplexer based on reuse of TFF/solution is not suitable for DWDM systems,due to the process of  narrow line-width thin-film filter is difficult and cost high. Due to the excellent properties of Narrow-band FBG, it can replace traditional TFF constructed for effective reuse of DWDM optical communication system multiplexer/solution, dynamic optical cross connector (OXC), optical multiplexer insert points (OADM), and so on.

the

The specturm of Narrow band-width FBG:

Raysung production workshop :

About Raysung Photonics Inc:

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 those three main products, Raysung can also manufacture wavelength stabilizer, 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 company is committed to the research, design and producing of those products and it is the only one manufacture 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 we have advanced technology and equipment. This allows us to provide our customers with high-quality products and optimized proposals.

In 2006, Raysung completed ISO9001: 2000 and ISO14001 certification and also obtained several patent rights. The materials of our products accord with RoHS criterion. Raysung's products are always superior in quality and competitive in price.