Loh, W.H., Laming, R.I. and Zervas, M.N.
Single frequency erbium fiber external cavity semiconductor laser
Applied Physics Letters, 66, (25), . (doi:10.1063/1.113374).
A novel external cavity configuration for stable single frequency operation of the semiconductor laser is demonstrated. By using an erbium doped fiber as the external cavity, longitudinal mode-hopping is suppressed, ensuring single frequency operation. Employing a 3m long fiber cavity, resolution-limited optical linewidths of a kHz are obtained.
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