Performance tests of angled fiber 3 dB couplers made with drawn silica substrates

• Published in: IEEE journal of quantum electronics Vol. 27; no. 3; pp. 543 - 548
• Main Authors: Harvey, G.T., Read, P.J., Feldblum, A.Y., Fanucci, R.E., Clark, H.R., Watros, T.L., Watkins, L.S.
• Format: Journal Article
• Language: English
• Published: New York, NY IEEE 01.03.1991; Institute of Electrical and Electronics Engineers
• Subjects: Applied sciences; Circuit properties; Coatings; Dielectric measurements; Dielectric substrates; Electric, optical and optoelectronic circuits; Electronics; Exact sciences and technology; Integrated optics. Optical fibers and wave guides; Nonhomogeneous media; Optical and optoelectronic circuits; Optical crosstalk; Optical fiber couplers; Optical fiber devices; Optical fiber testing; Performance evaluation; Silicon compounds; Design; Directional coupler; Optical coupler; Test; Performance; Silica; Optical fiber
• ISSN: 0018-9197; 1558-1713
• DOI: 10.1109/3.81361

A report is presented on a series of tests performed on angled-fiber-type optical couplers fabricated with drawn silica substrates. The couplers use a multilayer dielectric coating, applied directly on an angled fiber interface. Measured performance of the device shows an average near-end crosstalk of -48 and an excess of 0.46 dB. The use of an all silica design for the substrate holding the fiber results in good environmental performance. The simple design and compact nature of the coupler lend themselves to the economical replacement of separate splitters and detectors in single-mode bidirectional systems.< >