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

• Main Authors: JIA LINGHUI, LI JINGSI, CHEN XIANGFEI, SHI YUECHUN, LIU SHENGCHUN, LI SIMIN
• Format: Patent
• Language: Chinese; English
• Published: 26.09.2012
• Subjects: BASIC ELECTRIC ELEMENTS; DEVICES USING STIMULATED EMISSION; ELECTRICITY; OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS; OPTICS; PHYSICS

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, utilizesthe 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 grat