10 kHz linewidth 1.5 ?m InGaAsP external cavity laser with 55 nm tuning range |
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| Authors: | Wyatt R. Devlin W.J. |
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| Affiliation: | British Telecom Research Laboratories, Ipswich, UK; |
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| Abstract: | An InGaAsP 1.5 ?m laser, with one facet antireflection coated, has been incorporated into a diffraction grating external cavity. The lasing wavelength could be tuned over a 55 nm range about the centre wavelength of 1.5 ?m by rotating the grating. Furthermore, it was found that the emission spectrum was extremely narrow; beat-frequency measurements at 1523 nm against an HeNe laser showed it to be of the order of 10 kHz. |
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