Abstract

We demonstrate the frequency stabilization of a 1.5μm laser diode (LD) with a low-intensity noise and a narrow linewidth to a C213H2 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 2.3×1011 for τ=1s and 9.1×1012 for τ=100s. Furthermore, an RIN of less than 135dBHz and a linewidth of 4kHz were simultaneously achieved.

© 2009 Optical Society of America

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