Patent ID: 6987907
Filing Date: 2006-01-17
Classification: G02B

Abstract:
1. A filter system comprising: a first fiber optic collimator; a free space circulator coupled to said first fiber optic collimator; a first mirror coupled to said free space circulator; a holographic drop filter coupled to said first mirror to diffract at least one of a plurality of WDM channels to an optical system and pass through a remainder of said plurality of WDM channels; said optical system further comprising a lens and a second mirror coupled to each other; said optical system coupled to said holographic drop filter redirects said at least one of said plurality of WDM channels back into said holographic drop filter; a second fiber optic collimator coupled to said holographic drop filter that collects said remainder of said plurality of WDM channels that pass through said holographic drop filter; and a third fiber optic collimator coupled to said free space circulator that collects said one of plurality of WDM channels redirected into said holographic drop filter by said optical system.