Long term stability of a long intra-cavity saturable absorber external cavity semiconductor laser

Wahbeh, Mamoun; Kashyap, Raman; Lin, Wen-Yi; Wu, Po-Yi; Lu, Hai‐Han; Seregelyi, Joe

doi:10.1109/icait.2013.6621514

Cited by 2 publications

(1 citation statement)

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“…However, the output power was not specified and the single-frequency regime was also found to deteriorate depending on the semiconductor optical amplifier (SOA) drive current or, equivalently, on the intra-cavity power. The best long-term stability of single-frequency operation with a high SMSR of an erbium doped FECL was measured to be primarily within ± 1.5 pm ( ± 193 MHz) [16].…”

Section: Introductionmentioning

confidence: 96%

Purity of the single frequency mode of a hybrid semiconductor-fiber laser

Wahbeh¹,

Kashyap²

2015

Opt. Express

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The penalty of extending the cavity length of a laser diode when seeking a linewidth reduction is normally revealed by poor side mode suppression, which prevents the laser from operating purely in a single mode of the external cavity. A hybrid laser, based on a C-band semiconductor optical amplifier combined with a long erbium doped fiber external cavity, is carefully engineered to operate with high spectral purity and outstanding stability. For the first time, a side-mode suppression ratio of ≥42 dB, measured at a resolution of 1.16 pm (149 MHz) at all intra-cavity powers above the lasing threshold, is reported. The output power at the peak lasing wavelength is 13.3 dBm. Also, the ability to lock such a hybrid laser to a particular external-cavity mode is realized for the first time. Excluding the effect of mechanical and thermal drifts on the cavity length, the long-term frequency stability is demonstrated to be within ± 11 Hz while the long-term linewidth is 2.26 kHz, measured using the self-beating technique under free running conditions.

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Section: Introductionmentioning

confidence: 96%