FBG and lensed fiber are the main products of Raysung. Moreover, Raysung can manufacture the type of optical fiber which incorporates FBG and lensed fiber (Turn-Key).The minimum distance between lensed fiber and FBG Raysung can control is 1.5mm. This type of Turn-Key can be used as cavity resonator in the application of fiber laser and also stabilizator for pump laser.

Turn-key FBG and Lensed fiber,Assembly (FBG,lensed fiber and packaging)

Application of Turn-key FBG and Lensed fiber.

With the rapid development of optical communications and high power laser industry, fiber bragg grating, lensed fiber are appropriate to provide a more favorable features for laser. Semiconductor lasers are important components of optical fiber communication field, common FB type quantum-well semiconductor laser is widely applied because of lower price,but its spectral structures includes multi-longitudinal mode, influence the application in high-speed optical communication system. The Single-frequency characteristic of DFB lasers is very excellent, but it is difficult to control the wavelength accuracy, linewidth enhancement is serious at high speed modulation, and high cost and complex process to produce these devices. External cavity can obviously narrow the linewidth of semiconductor laser, and gain the coherent light which communication requires. The characteristics of the external cavity semiconductor laser depends on the external cavity parameters. The feedback of external cavity structure is Fiber bragg grating and reflecting mirror, but they are bulky, high cost, and is not easy to be coupled into the fiber. The emergence of semiconductor laser coupling module has opened up a new way for the above problems. Fiber Bragg grating has a narrow-band feedback feature, and the fiber lens improves the light coupling efficiency to reach 80%, thus improve the energy conversion efficiency of the laser. Semiconductor laser coupling module eliminates the splice insertion loss of lens and the fiber grating, and improve the tensile strength
of the system, thereby improve the service life of laser device, also reduce the machining process steps, enhance productivity, lower production cost.

At present, many manufacturers who produce external cavity semiconductor lasers and fiber laser, need to weld together with different components, in order to achieve higher power for lasers, semiconductor laser coupling module is an inevitable trend.

In 2011, our company completed the first semiconductor laser coupling module integrated production, lensed fiber is processed at the fiber end of fiber bragg grating. Low production cost, large-scale production, processing convenience, with a strong competitive advantage, filling the domestic blank in this field. Based on the breakthrough of core technologies, Rausung has successively developed narrowband fiber bragg grating, wedged and tapered lensed fiber, process the different shaped lens according to the light resource and actual requirement. We own unique detection software and test methods to guarantee product quality.

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 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.

In 2006, Raysung completed ISO9001: 2000 and ISO14001 certification and aslo 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.