Patent ID: 6768591
Filing Date: 2004-07-27
Classification: G02B

Abstract:
An interleaver comprising:an optical system having a first port, a second port, a third port, a half mirror, a first reflector, and a second reflector, and configured to split light having traveled from the first port to the half mirror, into two beams and direct the beams toward the first reflector and toward the second reflector, respectively, to split light having been reflected by the first reflector and having arrived at the half mirror, into two beams and direct the beams toward the second port and toward the third port, respectively, and to split light having been reflected by the second reflector and having arrived at the half mirror, into two beams and direct the beams toward the second port and toward the third port, respectively; and an etalon filter configured to cause a loss on either one of light incident thereto from the first port and the beams directed toward the second port and toward the third port.