Unlock instant, AI-driven research and patent intelligence for your innovation.

Photoelectric oscillator based on semiconductor multi-longitudinal mode laser

An optoelectronic oscillator and semiconductor technology, applied in microwave technology and optoelectronics, can solve problems such as difficult integration, difficult optimization of system structure and cost, and bulky OEO system

Active Publication Date: 2013-02-27
GUIZHOU UNIV
View PDF3 Cites 7 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the OEO system still needs to be improved in terms of practicability. The main problem is that although there are alternatives for each part of the system, most of them are independent of each other and difficult to integrate, so it is not easy to optimize from the perspective of system structure and cost; Long optical fibers can store more light field energy in the loop and improve the quality of the generated signal, but this also brings about the problem that the system is bulky, easily affected by the external environment, and side-mode noise is difficult to be filtered out by the filter. Therefore, how to simplify the system and reduce costs under the premise of ensuring performance is the key to the practical application of OEO
However, the multi-loop structure is complex and requires the use of long optical fibers, which makes the entire OEO system bulky and difficult to control stability;

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
  • Photoelectric oscillator based on semiconductor multi-longitudinal mode laser
  • Photoelectric oscillator based on semiconductor multi-longitudinal mode laser
  • Photoelectric oscillator based on semiconductor multi-longitudinal mode laser

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] The workflow is as follows: the semiconductor multi-longitudinal mode laser 1 outputs a set of laser modes with a center frequency of w and a frequency difference between adjacent modes of Δw from the output waveguide 1a. This set of laser modes can be expressed as w±nΔw (where n is an integer), By changing the injection current or temperature of the semiconductor multi-longitudinal mode laser 1, the carrier concentration of the semiconductor multi-longitudinal mode laser 1 can be changed, and then the center frequency w and the frequency difference Δw of the output laser mode can be adjusted. The output of the semiconductor multi-longitudinal mode laser 1 is injected into the photoelectric conversion modulation module 2; in the photoelectric conversion modulation module 2, the light field is divided into two paths by the optical coupler 3 and input into the photodetector 4 and the electro-optical modulator 6 (EAM); The detector 4 can detect the frequency difference Δw o...

Embodiment 2

[0026] The workflow is as follows: the semiconductor multi-longitudinal mode laser 1 outputs a group of laser modes with the center frequency w and the adjacent mode frequency difference Δw from the rear cavity mirror 1f and injects them into the photoelectric conversion modulation module 2; the light field injected into the photoelectric conversion modulation module 2 is first Enter the port two 8a of the three-port optical circulator 8, then connect to the optical coupler 3 from the output of the three-port optical circulator 8b; After the output of the second 8a, it is reversely injected into the semiconductor multi-longitudinal mode laser 1 by the rear cavity mirror 1f. All the other are with embodiment 1. . Through the self-injection locking process of the semiconductor multi-longitudinal mode laser 1 and external cyclic feedback, stable optical and electrical microwave signals with a frequency difference of Δw can be finally generated, and these signals can be output th...

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

The invention discloses a photoelectric oscillator based on a semiconductor multi-longitudinal mode laser. A photoelectric transfer modulation module (2) comprises an optical coupler (3), a photoelectric probe (4), an electric coupler (5), a photoelectric modulator (6) and an optical coupler (7). The output end of the optical coupler (3) is respectively connected with the input ends of the photoelectric probe (4) and the photoelectric modulator (6). The output end of the photoelectric probe (4) is connected with the input end of the electric coupler (5), and one output end of the electric coupler (5) is connected with a drive input end of the photoelectric modulator (6). The electric coupler (5) is provided with another output end. The output end of the photoelectric modulator (6) is connected with the input end of the optical coupler (7). The optical coupler (7) is provided with an optical signal output end and a feedback end connected with the semiconductor multi-longitudinal mode laser (1). The output end of the semiconductor multi-longitudinal mode laser (1) is connected with the input end of the optical coupler (3). The photoelectric oscillator based on the semiconductor multi-longitudinal mode laser is simple in structure, low in cost and convenient to use, and the frequency is tunable.

Description

technical field [0001] The invention relates to the fields of microwave technology and optoelectronic technology, in particular to a photoelectric oscillator. [0002] Background technique [0003] An optoelectronic oscillator (OEO: Optoelectronic Oscillator) is an optical and electrical microwave / millimeter wave signal generating device. Its basic structure is to use a feedback loop composed of a light source, an electro-optic modulator, a photodetector, and an electric filter, and use the energy storage capacity of a long optical fiber to generate high-quality optical and electrical microwave signals. At present, the OEO system still needs to be improved in terms of practicability. The main problem is that although there are alternatives for each part of the system, most of them are independent of each other and difficult to integrate, so it is not easy to optimize from the perspective of system structure and cost; Long optical fibers can store more light field energy in...

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): H01S5/10
Inventor 江阳白光富
Owner GUIZHOU UNIV