Title :
Development of fiber-optic depolarizer and its application to measurement systems for polarization-insensitive operation of silica-waveguide matrix switches
Author :
Takada, Kazumasa ; Himeno, Akira ; Kato, Kuniharu ; Okuno, Masayuki
Author_Institution :
NTT Opto-Electron. Labs., Ibaraki, Japan
fDate :
9/1/1994 12:00:00 AM
Abstract :
This paper describes an automatic system that measures the bias and switching currents of all the switch elements in the polarization-insensitive operation of silica-waveguide 8×8 matrix switches. A new type of depolarizer that can be used for coherent laser sources was compactly packaged with an excess loss of 6 dB. The packaged depolarizer was coupled to an automatic measurement system that was achieved mainly by using two 64-channel power supplies that drive all the heaters of a matrix switch via a computer. By using a DFB laser source at 1305 nm, whose output was unpolarized with the depolarizer, all the switch elements could be adjusted so that they were polarization insensitive within 0.3 dB to any polarization state. About 2 hours were required to complete the measurement for one matrix switch
Keywords :
automatic testing; integrated optics; light polarisation; optical fibres; optical polarisers; optical switches; optical waveguides; silicon compounds; switching systems; 2 h; 6 dB; 64-channel power supplies; DFB laser source; automatic measurement system; automatic system; coherent laser sources; computer; excess loss; fiber-optic depolarizer; heaters; measurement systems; packaged; polarization insensitive; polarization state; polarization-insensitive operation; silica-waveguide 8×8 matrix switches; silica-waveguide matrix switches; switch elements; switching currents; unpolarized; Current measurement; Optical crosstalk; Optical devices; Optical fiber polarization; Optical interferometry; Optical sensors; Optical switches; Packaging; Power measurement; Transmission line matrix methods;
Journal_Title :
Lightwave Technology, Journal of
