公开(公告)号：JP2001044558A

公开(公告)日：2001-02-16

申请号：JP2000212091

申请日：2000-07-13

Applicant: LUCENT TECHNOLOGIES INC

Inventor： BROUTIN SCOTT L ,  PLOURDE JAMES K ,  STAYT JOHN W JR

IPC: H01S5/00 ,  H01S5/024 ,  H01S5/06 ,  H01S5/068 ,  H01S5/0683 ,  H01S5/0687

Abstract: PROBLEM TO BE SOLVED: To stabilize and lock absolute wavelength of laser beams by a method, wherein a temperature change of an etalon optical filter is compensated actively. SOLUTION: A temperature of an etalon filter 30 is monitored by a thermistor 32, and a controller 40 monitors the etalon 30 and a laser chip 12 by use of an etalon path signal, reference path signal and a temperature measured by the thermistor 32. Thus, a temperature of the etalon is monitored, and a value of grid-offset is adjusted, based on a temperature change of the etalon. Here, the laser system 10 uses a value obtained in the grid-offset in calculation of a difference for use in controlling a TEC 52, and can compensate effectively a change of etalon reaction generated from the temperature change of the etalon. By compensating for the temperature change of the etalon, the laser system 10 can lock effectively to the absolute wavelength of a laser beam.

公开(公告)号：JP2001217502A

公开(公告)日：2001-08-10

申请号：JP2000381366

申请日：2000-12-15

Applicant: LUCENT TECHNOLOGIES INC

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

IPC: H01S5/0687 ,  H04B10/50 ,  H04B10/572 ,  H04J14/00 ,  H04J14/02 ,  H04B10/04 ,  H04B10/06 ,  H04B10/14

Abstract: PROBLEM TO BE SOLVED: To assure correct channel selection without turning off a laser light source of a system during a channel selection process in a wavelength stabilized control system. SOLUTION: A laser module 110 has a first output 120 connected to an optical link and a second output 122 connected to a controller 160 via a signal discriminator circuit 130. The controller 160 controls a channel selection process for the system 100. During the channel selection process, the controller 160 adjusts a gain section, a modulator and an amplifier as necessary to reduce the transmission power of the first output 120 and the second output 122 so that the first output 120 can not be detected by a receiver (far-end user of the system 100) connected to the link 120. The controller 160 initiates the channel selection process by adjusting the laser module 110 and monitoring etalon characteristics of the second output 122.

公开(公告)号：JP2001196688A

公开(公告)日：2001-07-19

申请号：JP2000396401

申请日：2000-12-27

Applicant: LUCENT TECHNOLOGIES INC

Inventor： ACKERMAN DAVID ALAN ,  BROUTIN SCOTT L ,  PLOURDE JAMES KEVIN ,  STAYT JOHN W JR

IPC: H01S5/0687 ,  H01S5/06 ,  H01S5/0625

Abstract: PROBLEM TO BE SOLVED: To provide a method and, a device for selecting an optimum operation state in a digital wavelength stabilization control system. SOLUTION: In this method, the value of a tuning current supplied to a multi-channel laser source is controlled. For each operation laser channel, the desired inclination of the laser source is stored as the function of the tuning current. Then, the inclination of the laser source is measured as the function of the tuning current. After that, the tuning current is adjusted until an inclination being essentially close to the desired one is measured. An operation tuning current to the laser source is set to a value corresponding to the measured inclination.

公开(公告)号：JP2001100855A

公开(公告)日：2001-04-13

申请号：JP2000226249

申请日：2000-07-27

Applicant: LUCENT TECHNOLOGIES INC

Inventor： BROUTIN SCOTT L ,  DAUTARTAS MINDAUGAS FERNAND ,  STAYT JOHN W JR

IPC: G06Q50/00 ,  G06F1/00 ,  G06F11/34 ,  G06F21/10 ,  G06F17/60

Abstract: PROBLEM TO BE SOLVED: To enable a user to restart a program, without penalty of lost time by surely performing exact tracking of execution time and by periodically updating execution time even when a program crush occurs. SOLUTION: Concerning the method for monitoring the use of the execution time of demonstration evaluation software, the number of clocks is monitored while running a software program and through the whole execution, the lapse of execution time is updated periodically. The lapse of execution time is stored inside a key in a concealed file or in software registry. Until the lapse of execution time exceeds a prescribed evaluation time, the program is continuously operated, and then running is disabled until the program is registered by the user.

公开(公告)号：CA2327981A1

公开(公告)日：2001-06-30

申请号：CA2327981

申请日：2000-12-08

Applicant: LUCENT TECHNOLOGIES INC

Inventor： ACKERMAN DAVID ALAN ,  STAYT JOHN WILLIAM JR ,  PLOURDE JAMES KEVIN ,  BROUTIN SCOTT L

IPC: H01S5/0687 ,  H01S5/06 ,  H01S5/0625 ,  H01S5/40

Abstract: A method for controlling tuning current values provided to a multichann el laser source. For each operating laser channel, a desired slope value of las er power as a function of tuning current is stored. The slope values of laser power as a function of tuning current is then measured. The tuning current is then adjusted until a slope value substantially close to said desired slope value is measured. The operating tuning current is set for the laser source that corresponds to the measured slope value.

公开(公告)号：CA2313839A1

公开(公告)日：2001-01-27

申请号：CA2313839

申请日：2000-07-13

Applicant: LUCENT TECHNOLOGIES INC

Inventor： BROUTIN SCOTT L ,  DAUTARTAS MINDAUGAS FERNAND ,  STAYT JOHN WILLIAM JR

IPC: G06Q50/00 ,  G06F1/00 ,  G06F11/34 ,  G06F21/10 ,  G06F17/60 ,  G06F11/30 ,  G06F12/14

Abstract: Monitoring clock ticks of a CPU ("computer processing unit") during its execution of a software program is provided. The clock ticks are monitored, and an elapsed runtime is updated, throughout execution of the program on a periodi c basis. The elapsed runtime is stored in a hidden file or within a key inside a software registry. Updating runtime on a periodic basis ensures accurate tracking of runtime usage even in the event of a program crash, allowing the user to restart the program witho ut the penalty of lost runtime. The software package will continue to operate until the elapsed runtime exceeds a predetermined evaluation time, at which point the software package is fully or partially disabled until it is registered by the user. An alternative to the hidden tracking file or registry is to use a World Wide Web push/pull technology to store runtime information at the software provider's site, allowing the provider to modify the evaluation period on a pay-per-use basis.

公开(公告)号：CA2313610A1

公开(公告)日：2001-01-13

申请号：CA2313610

申请日：2000-07-05

Applicant: LUCENT TECHNOLOGIES INC

Inventor： PLOURDE JAMES KEVIN ,  BROUTIN SCOTT L ,  STAYT JOHN WILLIAM JR

IPC: H01S5/00 ,  H01S5/024 ,  H01S5/06 ,  H01S5/068 ,  H01S5/0683 ,  H01S5/0687 ,  H01S3/106

Abstract: A unique method and apparatus for locking on an absolute wavelength of las er light output by a laser package by actively compensating for a change in the temperature of an etalon optical fitter is disclosed. Changes in etalon response characteristics due to temperature changes are compensated for by the addition (or subtraction) of an output voltage offset to the voltage control signal sent to the Thermo-Electric Cooler (TEC) from a controller within the laser package. The voltage offset is calculated by monitoring the etalon temperature. The voltage offset value provides for active compensation of changes in the etalon temperature and effectively "readjusts " the output of the laser as if the etalon temperature itself had been readjusted.

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.