Compact mode expanded lasers using resonant coupling between a 1.55-?m InGaAsP tapered active region and an underlying coupling waveguide
- 1 September 1998
- journal article
- Published by Institute of Electrical and Electronics Engineers (IEEE) in IEEE Photonics Technology Letters
- Vol. 10 (9) , 1232-1234
- https://doi.org/10.1109/68.705600
Abstract
We demonstrate a novel expanded mode laser for enhanced laser-fiber coupling based on resonant coupling between a tapered active waveguide and an underlying coupling waveguide. This device was grown in a single standard epitaxial growth and was processed using conventional fabrication techniques, thus making it attractive for low-cost manufacturing. The total taper length required for mode transformation was 200 /spl mu/m and the excess transformation loss was 0.6 dB indicating the compact, low-loss mode transformation. Far-field divergence angles (13/spl deg//spl times/24/spl deg/) and improved coupling to cleaved single-mode fibers (3.8-dB coupling loss), were achieved.Keywords
This publication has 5 references indexed in Scilit:
- A review on fabrication technologies for the monolithic integration of tapers with III-V semiconductor devicesIEEE Journal of Selected Topics in Quantum Electronics, 1998
- High butt-coupling efficiency to single-mode fibers using a 1.55-μm InGaAsP laser integrated with a tapered ridge mode transformerIEEE Photonics Technology Letters, 1997
- 1.55-?m InGaAsP-InP laser arrays with integrated-mode expanders fabricated using a single epitaxial growthIEEE Journal of Selected Topics in Quantum Electronics, 1997
- Improved laser-fiber coupling by using spot-size transformerIEEE Photonics Technology Letters, 1996
- 1.3 µm beam-expander integrated laser grownbysingle-step MOVPEElectronics Letters, 1995