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

A Bragg grating and equivalent chirp technology, applied in the field of optoelectronics, can solve the problems of limiting the large-scale application of lasers, high manufacturing costs, and complex grating structures

Inactive Publication Date: 2010-06-23
NANJING UNIV
View PDF6 Cites 37 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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 str...

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Planar waveguide Bragg grating and laser thereof based on reconstruction-equivalent chirp and equivalent apodization
  • Planar waveguide Bragg grating and laser thereof based on reconstruction-equivalent chirp and equivalent apodization
  • Planar waveguide Bragg grating and laser thereof based on reconstruction-equivalent chirp and equivalent apodization

Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment approach

[0065] 1. Planar waveguide Bragg grating devices based on reconstruction-equivalent chirp technology and equivalent apodization technology

[0066] Reconstruction-equivalent chirp technology is to change the sampling period of the grating to achieve equivalent phase shift and equivalent chirp. The equivalent phase shift is a sudden change in the sampling period, and the equivalent chirp is a continuous change in the sampling period. Fiber Bragg gratings with arbitrary target reflection spectra have been successfully applied and designed, and the principle can be found in literature [6] and patent [5]. The equivalent apodization technique is to change the sampling duty cycle. Since both have a sampling structure, they are well compatible.

[0067] If the sampling form is as figure 2 For the square waveform shown, according to theoretical calculations, the relationship between the refractive index modulation and the duty cycle of the ±1-level sub-grating in the sampling struct...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

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...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): G02B6/02H01S5/125
Inventor 施跃春陈向飞李思敏李静思贾凌慧刘盛春
Owner NANJING UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap