High butt-coupling efficiency to single-mode fibers using a 1.55-μm InGaAsP laser integrated with a tapered ridge mode transformer
- 1 November 1997
- journal article
- Published by Institute of Electrical and Electronics Engineers (IEEE) in IEEE Photonics Technology Letters
- Vol. 9 (11) , 1472-1474
- https://doi.org/10.1109/68.634712
Abstract
We demonstrate a tapered ridge mode expanded laser with reduced far-field divergence angles (9.5/spl deg//spl times/22/spl deg/) and improved coupling to cleaved single-mode fibers (SMF) (3.7-dB coupling loss). This device was grown in a single epitaxial growth and was processed using conventional fabrication techniques, thus making it very attractive for low-cost manufacturing. This scheme also represents a general method by which active gain regions can be introduced into passive optical devices like beam splitters and combiners.Keywords
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