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US5657155A Optical tap coupler device 失效
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Optical tap coupler device
摘要:
An optical tap/coupler consists essentially of a two graded index lenses having a holographic beam splitter (HBS) in between. The HBS independent of polarization state and wavelength of an input light beam splits an incoming beam into at least two beams. The two beams are directed to two separate locations or ports at an end face of one of the graded index lenses thereby providing a main beam and a tap beam at an output of the device. The device is compact and can accommodate other optical components between the two graded index lenses.
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