公开(公告)号：JPH11316310A

公开(公告)日：1999-11-16

申请号：JP5655899

申请日：1999-03-04

Applicant: LUCENT TECHNOLOGIES INC

Inventor： LASKOWSKI EDWARD JOHN ,  MUEHLNER DIRK JOACHIM

IPC: G02B6/12

Abstract: PROBLEM TO BE SOLVED: To provide a small-sized Mach-Zehnder interferometer. SOLUTION: In an optical interferometer 19 having a pair of optical waveguides 21 and 22 extended between a pair of optical coupler areas, the optical waveguides 21 and 22 have optical paths different by length between optical coupler areas which give a maximum transmission volume and a minimum transmission volume, and each of the pair of optical waveguides has a reflector part C which optically couples first and second segment parts A and B.

公开(公告)号：JP2000244041A

公开(公告)日：2000-09-08

申请号：JP2000035786

申请日：2000-02-14

Applicant: LUCENT TECHNOLOGIES INC

Inventor： BRUCE ALLAN J ,  MUEHLNER DIRK JOACHIM ,  SHMULOVICH JOSEPH

IPC: H01S3/06 ,  G02B6/12 ,  G02B6/122 ,  H01S3/063 ,  H01S3/10

Abstract: PROBLEM TO BE SOLVED: To provide a technology by which a POWA(planar optical waveguide amplifier) is coupled to a waveguide at low loss, to provide a device comprising the POWA connected to the waveguide, and to provide a method for manufacturing such a device. SOLUTION: The planar optical waveguide amplifier comprises a first planar optical waveguide 11 and a second planar optical waveguide 12 contacting to the first planar optical waveguide. The second planar waveguide comprises a planar waveguide doped with a rare earth element, and a first tapered part 13 which connects the electromagnetic radiation of at least one specified wavelength coming from the first planar optical waveguide to the planar waveguide doped with a rare earth element.