| Patent Number |
Title Of Patent |
Date Issued |
| 7233717 |
Reflective optical switch |
June 19, 2007 |
| A reflective optical switch comprises an input/output port portion; a polarization separator/combiner for separating lights in the same optical path and combining lights in different optical paths; a Faraday rotation angle changer; a polarization rotator for changing the relationship in |
| 7024073 |
Reflective variable light attenuator |
April 4, 2006 |
| A reflection-type variable optical attenuator comprises: a main attenuator unit including a first birefringent crystal plate, a Faraday rotational angle varying unit, and a second birefringent crystal plate arranged in this order; an input port and an output port that are arranged on a s |
| 6870675 |
Variable optical attenuator |
March 22, 2005 |
| A variable optical attenuator is disclosed which comprises a plane-parallel birefringent element for separation/synthesis which separates light beams having orthogonal polarization directions on the same optical path, the birefringent element synthesizing light beams on different optical |
| 6798566 |
Variable optical gain equalizer and variable branching ratio beam splitter |
September 28, 2004 |
| A variable optical gain equalizer in accordance with one embodiment of the present invention comprises a variable branching ratio beam splitter having a variable polarization rotator, the variable branching ratio beam splitter branching an input light beam into two light beams at an |
| 6667827 |
Beam shutter |
December 23, 2003 |
| A beam shutter is provided which comprises a plane-parallel birefringent element for separation arranged to separate input light beams having orthogonal polarization directions on the same optical path; a plane-parallel birefringent element for synthesis arranged to synthesize light |
