Title :
Adiabatic 3-dB couplers, filters, and multiplexers made with silica waveguides on silicon
Author :
Adar, R. ; Henry, Charles H. ; Kazarinov, Rudolf F. ; Kistler, R.C. ; Weber, Gary R.
Author_Institution :
AT&T Bell Lab., Murray Hill, NJ, USA
fDate :
1/1/1992 12:00:00 AM
Abstract :
The performance of adiabatic 3-dB couplers and V-branches is reported. These devices are broadband and divide power equally. They have no observable polarization dependence. Typical excess losses relative to a straight waveguide is 0.1-0.2 dB for the 3-dB couplers and about 0.4 dB for the V-branches. Fiber to fiber insertion loss of 0.31 dB was measured for a 2.5-cm straight waveguide. The devices were used to fabricate transmission filters peaked at 1.55 μm and power combiners having two channels at 1.48 and 1.55 μm. The device fabrication was improved by use of a flowable top cladding layer containing boron and phosphorous which easily filled-in between closely spaced waveguides
Keywords :
integrated optics; multiplexing equipment; optical communication equipment; optical couplers; optical filters; optical losses; optical waveguides; 0.31 dB; 1.48 micron; 1.55 micron; Si; SiO2; V-branches; broadband; closely spaced waveguides; device fabrication; equal power division; excess losses; fibre-to-fibre insertion losses; flowable top cladding layer; multiplexers; optical couplers; optical filters; power combiners; silica waveguides; transmission filters; Filters; Insertion loss; Loss measurement; Multiplexing; Optical device fabrication; Optical fiber couplers; Optical fiber devices; Optical fiber polarization; Power combiners; Silicon compounds;
Journal_Title :
Lightwave Technology, Journal of
