| 摘要 |
An optical tap/coupler consists essentially of a two graded index lenses hav ing a holographic beam splitter (HBS) in between. The HBS independent of polarization state an d 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 gra ded 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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