High-precision frequency linear-tuning narrow-linewidth laser device

Abstract

A high-precision frequency linear-tuning narrow-linewidth laser device comprises the components of a reference crystal oscillator, a frequency / phase discriminator, a loop filter, a voltage controlled oscillator, a programmable frequency divider, a frequency multiplier, a high-speed switch, a microwave amplifier, a second low-pass filter, an analog-to-digital converter, a controller, a digital-to-analog converter, a narrow-linewidth fiber laser, an electro-optic modulator, a tunable attenuator, a tunable optical filter, a circulator, a semiconductor laser, a current driving controller, a temperature controller, etc. The high-precision frequency linear-tuning narrow-linewidth laser device settles a problem of generating a low-noise RF signal in existing high-order sideband injection locking technology, and furthermore settles a problem of synchronous current compensation to a slave laser. A problem of high-order sideband injection locking in the slave laser is settled. Furthermore the high-precision frequency linear-tuning narrow-linewidth laser device can realize functions of precise control for the output frequency of the narrow-linewidth laser, linear tuning, etc.

Description

technical field [0001] The invention relates to laser frequency tuning, in particular to a high-precision frequency linear tuning narrow line width laser device. Background technique [0002] The single-mode laser light source with fast linear frequency modulation is widely used in high-resolution spectrometer, electronic measurement, laser radar, optical frequency domain reflectometer (OFDR), three-dimensional imaging, coherent spectrum analysis and other fields. Its frequency modulation linearity, frequency modulation range, Line width, etc. are important indicators of light source performance. [0003] The slave laser is locked to the sideband of the modulated master laser through the method of injection locking, so that not only the narrow line width and high frequency stability of the master laser can be completely copied to the slave laser, the output power can be effectively improved, and the The frequency of the slave laser can be controlled quickly and flexibly by ...

AI Technical Summary

Problems solved by technology

The problem to be solved by this device is to provide a high-precision frequency control, wide range, linearly tunable low-noise radio frequency signal for the tunable laser based on high-order sideband injection locking technology, and at the same time provide a synchronous compensation voltage for the slave laser. The driving current of the laser, in order to realize the high-order sideband of the slave laser locked in the injection laser, realize the fast, wide-range, linearly tunable laser output from the laser, and solve the problem of limited output power and tuning range of the tunable laser

Images