Patent ID: 6476959
Filing Date: 2002-11-05
Classification: H01S

Abstract:
A device, comprising:a signal generator operable to produce a signal beam at a signal frequency; a pump generator operable to produce a pump beam at a pump frequency that is different from said signal frequency; a polarizing beam splitter positioned to receive said signal beam in a first linear polarization at a first port and said pump beam in a second linear polarization orthogonal to said first linear polarization at a second port to output said signal and said pump beams at a third port; an optical medium positioned to receive said signal beam and said pump beam from said polarizing beam splitter, said optical medium exhibiting a Brillouin effect in response to said pump beam to produce at least one Brillouin signal that propagates opposite to a direction of said pump beam; and a polarization-rotating reflector positioned to receive a transmitted optical beam from said optical medium and reflect said transmitted optical beam back to said optical medium after rotating a polarization of said transmitted optical beam by 90 degrees.