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Laser and preparation method thereof

A technology of lasers and light fields, applied in lasers, laser components, semiconductor lasers, etc., can solve the problems of EML manufacturing difficulty, high power consumption and cost, and restrictions on large-scale use of optical communication networks, and achieve low cost and low cost. The effect of power consumption and low chirp

Pending Publication Date: 2022-05-10
ZHONGXING PHOTONICS TECH CO LTD
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Problems solved by technology

However, EML is difficult to manufacture, and its power consumption and cost are also high, which limits its large-scale use in optical communication networks.

Method used

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  • Laser and preparation method thereof
  • Laser and preparation method thereof
  • Laser and preparation method thereof

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Embodiment Construction

[0028] Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals designate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary only for explaining the present invention and should not be construed as limiting the present invention.

[0029] In the description of the present invention, it should be understood that when it comes to orientation descriptions, for example, the orientation or positional relationship indicated by up, down, etc. is based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description , rather than indicating or implying that the device or element referred to must have a particular orientation, be constructed and operate in a particular o...

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Abstract

The invention discloses a laser and a preparation method thereof, the laser comprises a distributed feedback laser and a filter, the distributed feedback laser comprises an active layer, a coupling layer and a passive layer, and a light field generated in the active layer is coupled into the passive layer through the coupling layer for transmission and enters the filter; the filter comprises a straight waveguide and an annular waveguide, the straight waveguide and the annular waveguide are made of extended passive layers, and the filter plays a role in shaping signals of the distributed feedback laser. The distributed feedback laser and the filter can be integrated without butt joint growth, the chirp problem during direct modulation of the distributed feedback laser can be effectively reduced, and the distributed feedback laser has the advantages of low chirp, large extinction ratio, low power consumption, simple process and the like, can replace an electric absorption modulation laser to be applied to long-distance transmission, and is simpler in manufacturing process, lower in cost and suitable for popularization and application. The structural design is reasonable, and the application range is wider.

Description

technical field [0001] The invention relates to the field of optoelectronic technology, in particular to a laser, a preparation method of the laser, optical communication equipment and an optical network system. Background technique [0002] In recent years, with the rapid development of Internet services, cost, size and power consumption have become the shackles for the development of optical devices in the direction of large bandwidth, high speed and long distance. As the core device in the optical device of the communication network, the laser is usually divided into direct modulation laser and external modulation laser. Distributed feedback laser (Distributed Feedback Laser, DFB) is a kind of directly modulated laser, because of its low cost, small size, high speed and high linearity, it is widely used in medium and short distance (below 10km) transmission. However, during the direct tuning process, the thermal effect and the change of the injection current will change ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01S5/10H01S5/12H01S5/227
CPCH01S5/10H01S5/1228H01S5/227
Inventor 朱瑞
Owner ZHONGXING PHOTONICS TECH CO LTD
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