公开(公告)号：JP2001311913A

公开(公告)日：2001-11-09

申请号：JP2001081260

申请日：2001-03-21

Applicant: LUCENT TECHNOLOGIES INC

Inventor： DAMASK JAY N ,  DOERR CHRISTOPHER RICHARD

IPC: G02B5/30 ,  G02B6/293 ,  G02B27/28

Abstract: PROBLEM TO BE SOLVED: To provide an improvement in polarized light diversification (diversity) double refractive filter. SOLUTION: The double-pass double refractive filter consists of an external interface device 402, a double refractive filter device 401 and a lap around device 403. The external interface device 402 receives an input light beam and forms parallel first and second forward direction polarized beams having the same polarization state offset in a first direction. The double refractive filter device 401 receives first and second forward direction polarized beams and forms first and second elliptically polarized beams. The wrap around device 403 forms four backward direction linearly polarized beams from the first and second elliptically polarized beams. The external interface device 402 forms two output beams having complementary intensity changing periodically together with frequencies from the four backward direction linearly polarized beams.

公开(公告)号：JP2001272533A

公开(公告)日：2001-10-05

申请号：JP2001081261

申请日：2001-03-21

Applicant: LUCENT TECHNOLOGIES INC

Inventor： DAMASK JAY N ,  DOERR CHRISTOPHER RICHARD

IPC: G02B5/30 ,  G02B6/34 ,  G02B27/28 ,  H04J14/02

Abstract: PROBLEM TO BE SOLVED: To improve a polarization diversity for birefringent filter. SOLUTION: The birefringent filter consists of an input optical device 402, a birefringent filter unit 401 and an output optical device 403. The input optical device 402 receives a first input optical beams and produces parallet first and second polarized optical beams offset in a first direction and having the same polarization, from the received first input optical beam. The birefringent filter unit 401 receives the first and the second polarized optical beams and produces a first and a second elliptically polarized optical beams. The output optical device 403 combines predetermined beam components of the first and the second elliptically polarized optical beams and produces a first and a second elliptically polarized optical beams. The two output beam have intensities varying inversely, in a periodic manner, as a function of frequency of the input optical beam.

公开(公告)号：DE60115525T2

公开(公告)日：2006-07-20

申请号：DE60115525

申请日：2001-03-12

Applicant: LUCENT TECHNOLOGIES INC

Inventor： DAMASK JAY N ,  DOERR CHRISTOPHER RICHARD

IPC: G02B5/30 ,  G02B27/28 ,  G02B6/293 ,  G02B6/34

Abstract: A double-pass birefringent filter apparatus comprises an external-interface apparatus (illustratively including of a beam-displacer element and a waveplate element); a birefringent filter comprised of a series of several birefringent waveplates; and a wrap-around unit (illustratively comprised of a beam-displacer element and a retro-reflector). In response to an input beam received at the external-interface apparatus, the double-pass birefringent filter forms two output beams having complimentary intensities which vary periodically with frequency.

公开(公告)号：DE60115525D1

公开(公告)日：2006-01-12

申请号：DE60115525

申请日：2001-03-12

Applicant: LUCENT TECHNOLOGIES INC

Inventor： DAMASK JAY N ,  DOERR CHRISTOPHER RICHARD

IPC: G02B5/30 ,  G02B6/293 ,  G02B6/34 ,  G02B27/28

Abstract: A double-pass birefringent filter apparatus comprises an external-interface apparatus (illustratively including of a beam-displacer element and a waveplate element); a birefringent filter comprised of a series of several birefringent waveplates; and a wrap-around unit (illustratively comprised of a beam-displacer element and a retro-reflector). In response to an input beam received at the external-interface apparatus, the double-pass birefringent filter forms two output beams having complimentary intensities which vary periodically with frequency.