公开(公告)号：CA2327778A1

公开(公告)日：2001-06-15

申请号：CA2327778

申请日：2000-12-07

Applicant: LUCENT TECHNOLOGIES INC

Inventor： STAYT JOHN WILLIAM JR ,  HARTMAN ROBERT LOUIS ,  BROUTIN SCOTT L ,  O'BRIEN STEPHEN

IPC: H01S5/0687 ,  H04B10/50 ,  H04B10/572 ,  H04J14/00 ,  H04J14/02 ,  H04B10/08

Abstract: A laser module, disposed within a wavelength stabilized control system, is provided with an integral modulator and optical amplifier. The laser module has a first output connected to an optical link and a second output connected to a controller via a signal discriminator circuit. The controller controls a channel selection process for the system. During the channel selection process, the controller adjusts a gain section, the modulator and amplifier as necessary to reduce the transmission power of the first and second outputs so that the first output can not be detected by a receiver connected to the link. The controller initiates the channel selection process by adjusting th e laser module and monitoring etalon characteristics of the second output. By tracking the etalon characteristics, the controller can determine when a wavelength of a desired channel has been obtained. Once the wavelength has been obtained it is locked and stabilized. Subsequently, the controller adjusts the gain section, modulator and amplifi er to obtain transmission power for the first and second outputs allowing the first outpu t to be detected by a receiver connected to the link. This way, a channel selection process can be performed without turning off the laser module, or its outputs, and witho ut corrupting any data on the optical link.

公开(公告)号：CA2336492A1

公开(公告)日：2001-09-15

申请号：CA2336492

申请日：2001-03-01

Applicant: LUCENT TECHNOLOGIES INC

Inventor： SCHNEEMEYER LYNN FRANCES ,  HARTMAN ROBERT LOUIS ,  BYLSMA RICHARD BENDICKS ,  ACKERMAN DAVID ALAN ,  LINES MALCOLM ELLIS ,  KOCH THOMAS LAWSON ,  KOWACH GLEN ROBERT

IPC: G02B6/12 ,  G02B1/02 ,  G02B5/28 ,  G02B6/34 ,  G02B6/42 ,  G02B7/00 ,  G02B26/00 ,  G02F1/01 ,  G02F1/21 ,  H01S5/068 ,  H01S5/125 ,  G02F1/00 ,  H04J14/02 ,  G02F1/29

Abstract: The thermo-optic behavior of an optical path over a range of temperatures .DELTA.T is controlled by determining a figure-of merit (FOM) for the optical path and including in the path a body of crystalline material that enables the conditions specified by the FO M to be satisfied. The crystalline material is highly transparent at a wavelength .lambda. of radiation propagating in the path, and it has a coefficient of thermal expansion (CTE) and a refractive index n such that the CTE and dn/dT are mutually adapted to satisfy the FOM over the range .DELTA.T. In on e embodiment, the CTE and dn/dT of an etalon compensate one another so as to perform frequency discrimination that is essentially temperature insensitive over the range .DELTA.T. In a preferred embodiment of the optical etalon the crystalline material comprises LiCaAlF6.