Laser class of SFP modules

At present, there are FBG, FB and DFB lasers, Among them, the most commonly used lasers are FP and DFB.

 

FBG: Fiber Bragg Grating.

FP: Fabry-Perot, Fabry-Perot Laser Diode

DFB: Distributed Feedback Laser, Distributed Feedback Laser Diode

 

For the mainstream commonly used FB and DFB. The DFB laser is based on the FP laser and uses a light filter device (which is equivalent to adding a gate with a slit to block other light and only pass the light of this wavelength), so that the device has only one longitudinal mode output (generally single-mode output). In terms of spectrum, it will output wavelength light within a range, among which the most central wavelength longitudinal mode is the highest, which is also named after this).

 

The characteristics of this type of device are: large output optical power, small divergence angle, extremely narrow spectrum, The modulation rate is high, which is suitable for long-distance communication. It is mostly used on the wavelength of 1550nm, and the rate is above 2.5G.

 

The semiconductor materials and resonator structure of the two are different. DFB lasers are expensive and are mostly used for optical modules with a transmission distance greater than 40km; while FP lasers are 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 laser types of SFP modules brought by Shenzhen Shenzhen HDV photoelectric Technology Co., Ltd. The module products produced by the company cover optical fiber modules, Ethernet modules, optical fiber transceiver modules, optical fiber access modules, SSFP optical modules, and SFP optical fibers, etc. The above module products can provide support for different network scenarios. A professional and strong R&D team can help customers with technical issues, and a thoughtful and professional business team can help customers get high-quality services during pre-consultation and post-production work.  Welcome you to contact us for any kind of inquiry.