SFP module laser classification

The current lasers are: FBG, FB, DFB, etc., among which the most commonly used are FP and DFB two lasers

FBG :Fiber Bragg Grating.

FP: Fabry-Perot, Fabry-Perot laser diode

DFB: Distributed Feedback Laser.

For the mainstream commonly used FB, DFB. DFB’s laser is based on the FP laser using a light frame optical device (equivalent to adding a gate with a gap, blocking other light, only through this wavelength of light) so that the device has only one longitudinal mode output (generally single mode on the spectrum, will output a range of wavelengths of light, of which the most central wavelength longitudinal mode is the highest, The characteristics of such devices are: large output optical power, small divergence Angle, extremely narrow spectrum, high modulation rate, suitable for long-distance communication. It is used at 1550nm wavelength and the rate is more than 2.5G.

The semiconductor materials and cavity structure of the two are different. DFB lasers are expensive and are mostly used for optical modules with a transmission distance greater than 40km. The FP laser is cheap and generally used for optical modules with a transmission distance of less than 40km. Users can choose according to the actual situation. At present, the most mature solutions of our company are optical devices using these two solutions.

The above is the introduction of the SFP module laser classification brought by Shenzhen HDV Phoelectron Technology LTD. The module products produced by the company cover fiber module, Ethernet module, fiber transceiver module, fiber access module, SSFP optical module, SFP optical module and so on. The above module class products can provide support for different network scenarios. For the above products, it is paired with a professional and strong R & D team to provide technical support for customers, and a thoughtful and professional business team to provide quality service for customers in the early consultation and later work.