Title :
Phase sensitive detection for mode-locked fiber laser gyroscope
Author :
Hong, Jong Bum ; Yeo, Yeong Bae ; Lee, Bong Wan ; Kim, Byoung Yoon
Author_Institution :
Dept. of Phys., Korea Adv. Inst. of Sci. & Technol., Seoul, South Korea
Abstract :
We demonstrate a significant improvement in the performance of a mode-locked fiber laser gyroscope by using a lock-in amplifier. We show that the direct output of the lock-in amplifier has a desirable linear dependence on the rotation rate and is insensitive to the intensity difference between two pulses that causes phase error in the time interval measurement. Two orders of magnitude improvement is demonstrated in the long-term stability compared to that from previously reported time interval measurement.
Keywords :
fibre lasers; fibre optic gyroscopes; laser mode locking; sensitivity; direct output; intensity difference; linear dependence; lock-in amplifier; long-term stability; mode-locked fiber laser gyroscope; phase error; phase sensitive detection; rotation rate; time interval measurement; Fiber lasers; Gyroscopes; Laser mode locking; Phase detection; Phase measurement; Pulse amplifiers; Pulse measurements; Rotation measurement; Stability; Time measurement;
Journal_Title :
Photonics Technology Letters, IEEE
