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Semiconductor optical amplifier array coupled to uncoated flat-end fibers with integrated beam expanders and TiO/sub 2/ antireflection coatings
- Source :
- IEEE Journal of Selected Topics in Quantum Electronics. 3:1421-1428
- Publication Year :
- 1997
- Publisher :
- Institute of Electrical and Electronics Engineers (IEEE), 1997.
-
Abstract
- We present a novel coupling scheme consisting of an integrated beam expander, a specifically tailored TiO/sub 2/ antireflection coating, optical index matching gel, and uncoated flat-end single-mode fiber (SMF). This scheme was used to package four-channel semiconductor optical amplifier arrays. Far-field profiles for each discrete amplifier in the array are typically 80 and 150 FWHM, perpendicular and parallel to the junction plane, respectively. The TiO/sub 2/ AR coating overcomes the indices mismatching of fiber glass and InP based device, and reduce optical reflection to 0.002% at 1.55 /spl mu/m. Misalignment tolerance in the l-dB excess loss range, for a discrete channel, is typically 5 /spl mu/m vertically and 8 /spl mu/m laterally. The average coupling loss is 4.3 dB per facet for the devices measured. Fiber coupled small signal gain for the amplifiers is typically 11.6 dB and a saturation output power of 3.0 dBm. The method of characterization and optimization of the TiO/sub 2/ coating is discussed.
- Subjects :
- Optical amplifier
Coupling loss
Materials science
business.industry
Amplifier
engineering.material
Atomic and Molecular Physics, and Optics
law.invention
Full width at half maximum
Anti-reflective coating
Optics
Coating
law
engineering
Beam expander
Electrical and Electronic Engineering
business
Refractive index
Subjects
Details
- ISSN :
- 1077260X
- Volume :
- 3
- Database :
- OpenAIRE
- Journal :
- IEEE Journal of Selected Topics in Quantum Electronics
- Accession number :
- edsair.doi...........e9423c037318eb6b3d3000c3a2600f9c