Planar waveguide Bragg grating and laser thereof based on reconstruction-equivalent chirp and equivalent apodization

Abstract

Disclosed are a planar waveguide Bragg grating and a laser thereof based on reconstruction-equivalent chirp and equivalent apodization; the grating adopts sampling structure, the real phase shift or real chirp of the grating is fabricated through reconstruction-equivalent chirp technology; meanwhile, the equivalent apodization is also introduced to the sampling structure to change the sampling duty cycle Gamma along the cavity length direction to realize apodization. The invention combines the equivalent apodization technology in FBG design with the reconstruction-equivalent chirp technology to design a planar waveguide Bragg grating device and a high-performance DFB semiconductor laser. The invention maintains the cycle and refractive index modulation of a seed grating constant, utilizes the sampling structure of gradient duty cycle to effectively introduce the apodization to the planar waveguide Bragg grating, accordingly eliminates the sidelobe of the transmission spectrum of the planar waveguide Bragg grating and ensures the time delay spectrum to be smooth so that planar waveguide Bragg grating devices with high performance are designed.

Description

technical field [0001] The invention belongs to the field of optoelectronic technology, relates to optical fiber communication, photon integration, photoelectric sensing and other photoelectric information processing, and proposes a design and manufacture scheme of an apodized planar waveguide Bragg grating and a distributed feedback (DFB) semiconductor laser, which is based on Reconstruction-equivalently chirped and equivalently apodized planar waveguide Bragg gratings and their lasers. Background technique [0002] As the basis of information transmission, optical fiber communication system is developing towards high speed and network. After experiencing explosive expansion in the past few years, the Internet has entered a period of stable development. The speed and capacity of the Internet keep growing steadily, and gradually integrate the traditional telephone network and cable TV network to form a unified information network. Only the optical fiber communication syste...

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Problems solved by technology

Although these structures have effectively improved the performance of the laser, their manufacturing cost is higher due to the more complex grating structure, such as the use of electron beam lithography (E-Beam lithography), and the high manufacturing cost limits the size of these lasers. scale application

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