Title :
Frequency stabilization of laser diode using a frequency-locked ring resonator to acetylene gas absorption lines
Author :
Sakai, Y. ; Yokohama, I. ; Kominato, T. ; Sudo, S.
Author_Institution :
NTT Opto-Electron. Lab., Kanagawa, Japan
Abstract :
The frequency stabilization of a 1.5 mu m distributed-feedback (DFB) laser diode using a planar lightwave circuit (PLC) ring resonator whose resonant frequency is locked to /sup 12/C/sub 2/H/sub 2/ and /sup 13/C/sub 2/H/sub 2/ gas absorption lines is described. The resonant frequency of PLC ring resonator was stabilized within a 5 MHz peak-to-peak fluctuation. With this ring resonator the outer frequency fluctuation of the DFB laser diode was stabilized within 10 MHz at every resonant frequency at 5 GHz intervals. The stability demonstrated is as good as the method using molecular absorption lines as a reference. The stabilized frequency can be selected at any point on the optical resonant peaks of the optical resonator.<>
Keywords :
distributed feedback lasers; infrared spectra of organic molecules and substances; laser cavity resonators; laser frequency stability; organic compounds; ring lasers; semiconductor junction lasers; 1.5 micron; DFB LD; acetylene gas absorption lines; frequency stabilization; frequency-locked ring resonator; laser diode; optical resonant peaks; outer frequency fluctuation; planar lightwave circuit; resonant frequency; Absorption; Diode lasers; Fluctuations; Optical resonators; Optical ring resonators; Programmable control; RLC circuits; Resonance; Resonant frequency; Stability;
Journal_Title :
Photonics Technology Letters, IEEE
