Over 115 mW single longitudinal mode laser output was obtained from a DFB laser diode integrated with a vertically tapered mode expander. The circular cross-sectional laser beam profile with the FWHM divergence angles of 9.5° × 13.5° enabled a high coupling efficiency of 63% directly into a lensed singlemode fibre, resulting in a fibre coupled output of over 70 mW.


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    Bhattacharya, A. / Mawst, L.J. / Botez, D. | IEEE | 1997


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    Wang, Yuncai / Chen, Guofu / Wang, Xianhua | SPIE | 1998


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    Umbach, A. / Trommer, D. / Steingruber, R. et al. | British Library Online Contents | 2001