Optical isolator and method for assembling same
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United States of America Patent
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Apr 20, 1993
Grant Date -
N/A
app pub date -
Jul 12, 1991
filing date -
Nov 14, 1989
priority date (Note) -
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Abstract
In optical isolators composed of a polarizer, an analyzer, a Faraday rotator and permanent magnet for magnetizing the Faraday rotator for the Faraday effect, this invention enables controlling of the maximum isolation temperature in the 0.degree. to 70.degree. C. temperature range. When assembling the device at room temperature, the Faraday rotator's wavelength-dependence characteristics are used for this purpose. By varying the wavelength during the assembly and adjustment process by .DELTA..lambda. from the wavelength at the device will be used, it is possible to set the temperature at which maximum isolation will be realized.
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