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

Direct high-speed modulation outer cavity type wavelength tunable laser

A technology for tuning lasers and lasers, which can be applied to devices that control the output parameters of lasers, structures of optical resonators, etc., which can solve the problems of wide laser spectrum and achieve the effect of ensuring tuning accuracy.

Inactive Publication Date: 2013-07-24
SICHUAN MARS TECH
View PDF3 Cites 10 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The traditional FP (Fabry-Perot) laser refers to the Fabry-Perot laser, which has a Fabry-Perot resonant cavity and is a multi-mode laser that emits multi-wavelength lasers, that is, the emitted laser spectrum is within a certain wavelength range. The wavelength distribution has several peaks. The position distribution of these wavelength peaks and the distance between them (called free spectral range) are determined by the gain curve, optical refractive index and its length of the chip, and the positions of these wavelength peaks are comb-shaped. , its disadvantage is: within a certain wavelength range, the spectrum range of laser emission is wide

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
  • Direct high-speed modulation outer cavity type wavelength tunable laser
  • Direct high-speed modulation outer cavity type wavelength tunable laser
  • Direct high-speed modulation outer cavity type wavelength tunable laser

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Such as figure 1 , figure 2 As shown, a direct signal modulation external cavity wavelength tunable laser, which includes a semiconductor FP laser chip 1 for generating an excitation light source, providing laser gain, and directly modulating the working rate of the output laser at high speed, for external cavity feedback And the wavelength-tuned passive photonic chip 2, the laser spectrum emitted by the FP laser chip 1 has a comb-shaped emission peak distribution; the FP laser chip 1 and the passive photonic chip 2 each have a waveguide, and the two chips are coupled and docked through the waveguide core The waveguide of the passive photonic chip has an external cavity feedback area composed of a laser phase control part 23 and a waveguide mirror part 22, and the external cavity feedback area and the FP laser chip 1 form a laser resonant cavity, and the waveguide mirror part 22 has a comb Shaped distribution of reflection peaks, the wavelength interval of adjacent re...

Embodiment 2

[0045] Such as Figure 7 Shown is the embodiment two of the present invention, and the process of forming the laser resonant cavity and generating laser in this embodiment two and embodiment one is all the same, and the difference with embodiment one is: the FP laser chip is placed in the heater or cooling Above the device 7, the comb-shaped emission peak spectrum of the FP laser chip 1 can be changed by the temperature change of the heater or cooler 7. Electrodes can also be arranged on the waveguide 11 of the FP laser chip, and the waveguide refractive index of the waveguide 11 of the FP laser chip can be changed by heating the electrode or injecting carriers to the electrode.

[0046] First change the wavelength position of the comb-shaped reflection peak distribution of the waveguide mirror part 22 of the passive photonic chip 2 through the corresponding electrodes, or first change the wavelength position of the comb-shaped emission peak distribution of the FP laser chip 1...

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 direct high-speed modulation outer cavity type wavelength tunable laser which comprises an FP laser chip and a passive photon chip. The FP laser chip can perform direct high-speed modulation to working rate of output laser, and laser spectrums emitted and output by the FP laser chip form pectinate emission peak distribution. The FP laser chip and the passive photon chip are respectively provided with waveguides and are coupled and jointed in a butting mode through waveguide cores. The reflecting mirror portions of the waveguides form pectinate reflection peak distribution, and wavelength intervals of adjacent reflection peaks are different from those of adjacent emission peaks emitted by the FP laser chip. By changing the waveguide refractive indexes of the reflecting mirror portions alternatively, wavelength positions where the reflection peaks of the reflecting mirror portions are distributed are accordingly changed or tuned. The direct high-speed modulation outer cavity type wavelength tunable laser can output single-wavelength laser and continuously or selectively change the wavelength of the output laser, can extensively tune the wavelength of the output laser and can further directly modulate and output the laser at high speed and achieve broadband data transmission.

Description

technical field [0001] The invention relates to a tunable laser, in particular to a directly high-speed modulation external cavity wavelength tunable laser. Background technique [0002] Wavelength Division Multiplexing (WDM) has been widely used in fiber optic communication systems. A wavelength division multiplexed optoelectronic transponder consists of a laser, a modulator, a receiver and associated electronics. The operation of the WDM converter can be realized by a fixed-wavelength laser at the near-infrared wavelength of 1550nm. Due to the ease of operation and high reliability, distributed feedback (DFB) lasers are widely used in WDM transmission systems. In the DFB laser, the diffraction grating that provides optical feedback is located above the entire gain resonant cavity, so that the laser will obtain a stable single-mode oscillation at a fixed wavelength. Also, information transmission at low digital rates can also be achieved by directly modulating the DFB la...

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
Patent Type & Authority Applications(China)
IPC IPC(8): H01S5/14H01S5/06
Inventor 李若林
Owner SICHUAN MARS TECH