A kind of semiconductor laser and control method
A laser and semiconductor technology, applied in the field of optoelectronics, can solve the problems of unreliable quality and long length of tunable multi-wavelength lasers, and achieve the effect of reducing the overall cavity length, shortening the cavity length, and shortening the overall cavity length.
Active Publication Date: 2019-11-05
NANJING UNIV
View PDF7 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
[0004] The invention proposes a semiconductor laser and a control method to solve the problems of long length and unreliable quality of tunable multi-wavelength laser
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 moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0030] In order to make the purpose, technical solution and advantages of the present application clearer, the technical solution of the present application will be clearly and completely described below in conjunction with specific embodiments of the present application and corresponding drawings. Apparently, the described embodiments are only some of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of this application.
[0031] The traditional tunable distributed feedback semiconductor laser based on the series method integrates m distributed feedback resonators with different operating wavelengths in series on the same integrated chip. Each distributed feedback resonator is independently controlled and selected by current One of the distributed feedback resonators wo...
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
Login to View More Abstract
The invention provides a semiconductor laser and a control method. The laser and the method are used for solving the problems that the length of a tunable multi-wavelength laser is too long and quality is unreliable. The semiconductor laser comprises optical grating regions and phase shifting structures; the optical grating regions are fabricated on the same laser chip in series; an optical grating period is constant in each of the optical grating regions, and the optical grating periods of different optical grating regions are progressively increased or progressively decreased along the laserchip; any two adjacent optical grating regions are injected with current to generate single mode laser emission; the phase shifting structures are located between adjacent optical grating regions, and phase shifting values are in the range of 0-360 degrees, generally pi. The invention further comprises the semiconductor laser control method, the method comprises the steps of injecting operating current higher than a threshold into any two adjacent optical grating regions, the operating current of the remaining optical grating regions is transparent current, and the single mode laser emissionis generated; the temperature and the operating current of the optical grating regions are changed, and the single mode laser emission is tuned.
Description
technical field [0001] The present application relates to the field of optoelectronic technology, in particular to a multi-wavelength semiconductor laser and a control method. Background technique [0002] Optical communication is the foundation of contemporary communication. With the continuous increase of broadband demand, the network structure becomes more and more complex. In order to reduce the network cost and simplify the structure, a large number of low-cost wavelength continuously tunable lasers need to be used in various optical fiber systems such as access networks based on wavelength division multiplexing (WDM) systems and software-defined networks. Tunable lasers can be used as specific wavelength lasers or backup lasers, and are an important part of WDM systems. Can greatly reduce the complexity and operating costs of the WDM system. At present, the structures of tunable lasers mainly include the following types, but each has its own advantages and disadvant...
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
Login to View More Patent Type & Authority Patents(China)
IPC IPC(8): H01S5/06H01S5/125
CPCH01S5/0607H01S5/125
Inventor 赵雍肖如磊施跃春陈向飞
Owner NANJING UNIV