We demonstrate the frequency stabilization of a 1.5 μm laser diode (LD) with a low-intensity noise and a narrow linewidth to a 13C 2H2 linear absorption line. The LD consists of an InP gain chip and an external Bragg reflector made of a PLC waveguide. By employing an external frequency modulator in a frequency stabilization circuit, an FM-eliminated optical output beam was obtained. The frequency stabilities reached as high as 2.3 × 10-11 for τ= 1 s and 9.1 × 10-12 for τ= 100 s. Furthermore, an RIN of less than -135 dB/Hz and a linewidth of 4 kHz were simultaneously achieved.
ASJC Scopus subject areas
- Atomic and Molecular Physics, and Optics