Title :
Stable Dual-Wavelength DFB Fiber Laser With Separate Resonant Cavities and Its Application in Tunable Microwave Generation
Author :
Sun, Jie ; Dai, Yitang ; Chen, Xiangfei ; Zhang, Yejin ; Xie, Shizhong
Author_Institution :
Dept. of Electron. Eng., Tsinghua Univ., Beijing
Abstract :
A single-longitudinal-mode dual-wavelength distributed feedback fiber laser with a wavelength spacing of 0.312 nm is proposed and demonstrated. Based on two spatially separated resonant cavities in a single fiber Bragg grating made by a simple method, stable dual-wavelength lasing is established. Then, a 38.67-GHz microwave signal generated by beating the two lasing wavelengths is obtained with a 3-dB bandwidth of ~6 kHz and a frequency drift <5 MHz without any feedback mechanism. As a potential application of this device, a tunable microwave source ranging from 18.67 to 58.67 GHz (with a small discontinuity) is proposed and partially demonstrated
Keywords :
Bragg gratings; distributed feedback lasers; fibre lasers; laser cavity resonators; laser modes; laser stability; laser tuning; microwave generation; microwave photonics; optical fibres; 18.67 to 58.67 GHz; 38.67 GHz; 6 kHz; distributed feedback laser; dual-wavelength laser; fiber Bragg grating; fiber laser; lasing wavelength beating; microwave signal generation; resonant cavities; single-longitudinal-mode laser; stable laser; tunable microwave generation; tunable microwave source; wavelength spacing; Distributed feedback devices; Fiber lasers; Laser feedback; Laser stability; Masers; Microwave devices; Microwave generation; Resonance; Signal generators; Tunable circuits and devices; Distributed feedback; dual-wavelength fiber laser; fiber Bragg grating; microwave generation;
Journal_Title :
Photonics Technology Letters, IEEE
DOI :
10.1109/LPT.2006.887336
