Optical: systems and elements – Polarization without modulation – By relatively adjustable superimposed or in series polarizers
Patent
1996-02-28
2000-09-05
Shafer, Ricky P.
Optical: systems and elements
Polarization without modulation
By relatively adjustable superimposed or in series polarizers
359496, 359583, 359629, 359634, 359636, 359638, 359834, G02B 530
Patent
active
061151785
ABSTRACT:
The invention provides an optical device suitable for use with an optical amplifier, for example, in an optical communication system and advantageous in that different functions of a plurality of optical elements are achieved using an optical element of a simple construction and the optical device can be produced in a reduced size at a reduced cost. The optical device includes a tapered prism constructed such that a first face and a second face thereof opposing to each other do not extend in parallel to each other. A dielectric multi-layer film is formed on the first face of the tapered prism positioned on an optical signal inputting side. A reflection film is formed on the second face for reflecting the optical signal inputted to the tapered prism through the first face at least once toward the first face. A non-reflection film is formed on one of the first face, the second face and the other face or faces of the tapered prism for extracting therethrough the optical signal inputted to and reflected in the tapered prism.
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Kubo Teruhiro
Naganuma Norihisa
Fujitsu Limited
Shafer Ricky P.
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