Spot-size conversion using uniform waveguide sections for efficient laser-fiber coupling

Using numerically simulated results, it is shown that an efficient laser-to-fiber coupling is possible by incorporating a uniform spot-size converter (SSC) with two nonidentical but phase matched optical waveguides. Using a "diluted" waveguide with a low index contrast, the power coupling...

Full description

Saved in:
Bibliographic Details
Published in:Journal of lightwave technology 2001-05, Vol.19 (5), p.708-716
Main Authors: Wongcharoen, T., Rahman, B.M.A., Rajarajan, M., Grattan, K.T.V.
Format: Article
Language:English
Subjects:
Applied sciences
Beams (radiation)
Circuit properties
Computer simulation
Conversion
Costs
Electric, optical and optoelectronic circuits
Electronics
Exact sciences and technology
Integrated optics
Integrated optoelectronics. Optoelectronic circuits
Joining
Mathematical models
Noise levels
Optical and optoelectronic circuits
Optical beams
Optical coupling
Optical devices
Optical fiber couplers
Optical fiber devices
Optical losses
Optical waveguides
Tolerances
Waveguide lasers
Waveguides
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Using numerically simulated results, it is shown that an efficient laser-to-fiber coupling is possible by incorporating a uniform spot-size converter (SSC) with two nonidentical but phase matched optical waveguides. Using a "diluted" waveguide with a low index contrast, the power coupling loss can be significantly reduced from 10.4 dB to only 1.15 dB and at the same time 1.0 dB alignment tolerances can also be improved to achieve /spl plusmn/1.8 /spl mu/m. Besides the improved coupling, the beam divergence of the far-field is also reduced considerably to 9/spl deg/, accompanied by a significant lowering of the reflected power from the fiber interface.
ISSN:0733-8724
1558-2213
DOI:10.1109/50.923484