TERMIUM Plus®
The Government of Canada’s terminology and linguistic data bank.
LASER COUPLING [10 records]
Record 1 - internal organization data 2011-01-05
Record 1, English
Record 1, Subject field(s)
- Lasers and Masers
- Optics
- Navigation Instruments
Record 1, Main entry term, English
- lock-in
1, record 1, English, lock%2Din
correct, noun
Record 1, Abbreviations, English
Record 1, Synonyms, English
- lock-in phenomenon 2, record 1, English, lock%2Din%20phenomenon
correct
Record 1, Textual support, English
Record number: 1, Textual support number: 1 DEF
The phenomenon exhibited by laser gyros that is characterized by frequency locking of the clockwise and counterclockwise beams at low input rates. 3, record 1, English, - lock%2Din
Record number: 1, Textual support number: 1 CONT
Lock-in is a fundamental physical phenomenon associated with all oscillating devices. Laser gyros exhibit the same phenomenon, in that the coupling mechanism is the reflection of light from one laser beam back along the path where it interacts with the oppositely traveling beam. This is called backscatter and is caused primarily by imperfect mirrors. 4, record 1, English, - lock%2Din
Record number: 1, Textual support number: 1 OBS
[Lock-in] is caused by the coupling of energy between the laser beams and results in a threshold error near zero input angular rate unless a corrective means, such as biasing, is used. 3, record 1, English, - lock%2Din
Record 1, Key term(s)
- lock-in phenomena
Record 1, French
Record 1, Domaine(s)
- Masers et lasers
- Optique
- Instruments de navigation
Record 1, Main entry term, French
- blocage
1, record 1, French, blocage
correct, masculine noun
Record 1, Abbreviations, French
Record 1, Synonyms, French
- couplage 2, record 1, French, couplage
correct, masculine noun
Record 1, Textual support, French
Record number: 1, Textual support number: 1 CONT
L'origine physique [du] blocage des oscillations [gyromètre laser] tient à ce qu'une partie de chacun des rayonnements se déplaçant dans un sens donné est renvoyée dans l'autre sens; ce renvoi est notamment dû aux irrégularités de surface des miroirs et aux variations d'indice de ces miroirs. 3, record 1, French, - blocage
Record number: 1, Textual support number: 2 CONT
La structure simple du gyrolaser lui confère une excellente fiabilité et une bonne précision [...] Les défauts de surface des miroirs, même infimes, provoquent la rétrodiffusion d'une partie de chaque rayon qui se couple alors avec le rayon se propageant dans l'autre sens. Il se crée ainsi un couplage (lock-in) entre les faisceaux lasers et une zone aveugle pour les vitesses angulaires faibles. 2, record 1, French, - blocage
Record 1, Key term(s)
- blocage des oscillations
Record 1, Spanish
Record 1, Textual support, Spanish
Record 2 - internal organization data 2002-04-25
Record 2, English
Record 2, Subject field(s)
- Optics
- Lasers and Masers
- Flight Instruments and Equipment (Aeroindustry)
Record 2, Main entry term, English
- ring laser gyro’s dead zone
1, record 2, English, ring%20laser%20gyro%26rsquo%3Bs%20dead%20zone
correct
Record 2, Abbreviations, English
Record 2, Synonyms, English
- dead zone 2, record 2, English, dead%20zone
correct
Record 2, Textual support, English
Record number: 2, Textual support number: 1 CONT
Lock-in is a fundamental physical phenomenon associated with all oscillating devices. Laser gyros exibit the same phenomenon, in that the coupling mechanism is the reflection of light from one laser beam back along the path where it interacts with the oppositley traveling beam. This is called backscatter and is caused primarily by imperfect mirrors. Therefore, at low rotation rates, there is no frequency difference between the counter-rotating beams so that the gyroscope does not indicate any rotation. In spite of the ring laser gyro's dead zone whith lock-in thresholds on the order of hundreds of degrees per hour, it is still feasible to obtain measurements of rotation rates of less than 1 deg/h. 1, record 2, English, - ring%20laser%20gyro%26rsquo%3Bs%20dead%20zone
Record 2, Key term(s)
- RLG dead zone
Record 2, French
Record 2, Domaine(s)
- Optique
- Masers et lasers
- Instruments et équipement de bord (Constructions aéronautiques)
Record 2, Main entry term, French
- zone aveugle
1, record 2, French, zone%20aveugle
correct, feminine noun
Record 2, Abbreviations, French
Record 2, Synonyms, French
- zone aveugle pour les vitesses de rotation faibles 2, record 2, French, zone%20aveugle%20pour%20les%20vitesses%20de%20rotation%20faibles
correct, feminine noun
Record 2, Textual support, French
Record number: 2, Textual support number: 1 DEF
Zone dans laquelle le gyroscope ne détecte pas le mouvement lorsque la vitesse de rotation est faible. 2, record 2, French, - zone%20aveugle
Record number: 2, Textual support number: 1 CONT
Le gyrolaser [...] Défauts [...] un phénomène de couplage fait que les ondes restent synchronisées tant que leurs fréquences ne sont pas suffisamment éloignées. Il en résulte que, pour de faibles vitesses angulaires (inférieures à 100°/s) [...] le dispositif ne détecte rien : c'est la zone aveugle. Pour pallier cette difficulté, les constructeurs ont envisagé plusieurs solutions : soit donner une vitesse de rotation constante à l'appareil, suffisante pour qu'il se trouve en dehors de la zone aveugle [...]; soit faire vibrer l'appareil [...] et ne procéder aux mesures que lorsque le système est en dehors de la zone aveugle; soit [...] provoquer un équivalent statistique du pivotement mécanique permanent en introduisant dans le trajet des ondes un élément perturbateur (tel qu'une cellule Kerr), qui induit un glissement de phase; s'il est suffisant, le gyrolaser travaille dans la zone non perturbée. 3, record 2, French, - zone%20aveugle
Record 2, Key term(s)
- zone aveugle pour vitesse de rotation faible
Record 2, Spanish
Record 2, Textual support, Spanish
Record 3 - internal organization data 2002-04-17
Record 3, English
Record 3, Subject field(s)
- Photoelectricity and Electron Optics
- Electromagnetic Radiation
- Lasers and Masers
Record 3, Main entry term, English
- backscatter
1, record 3, English, backscatter
correct, noun
Record 3, Abbreviations, English
Record 3, Synonyms, English
- back-scattering 2, record 3, English, back%2Dscattering
correct
- backscattering 3, record 3, English, backscattering
correct
Record 3, Textual support, English
Record number: 3, Textual support number: 1 CONT
Lock-in is a fundamental physical phenomenon associated with all oscillating devices. Laser gyros exhibit the same phenomenon, in that the coupling mechanism is the reflection of light from one laser beam back along the path where it interacts with the oppositely traveling beam. This is called backscatter and is caused primarily by imperfect mirrors. 4, record 3, English, - backscatter
Record 3, Key term(s)
- back-scatter
Record 3, French
Record 3, Domaine(s)
- Photo-électricité et optique électronique
- Rayonnements électromagnétiques
- Masers et lasers
Record 3, Main entry term, French
- rétrodiffusion
1, record 3, French, r%C3%A9trodiffusion
correct, feminine noun
Record 3, Abbreviations, French
Record 3, Synonyms, French
Record 3, Textual support, French
Record number: 3, Textual support number: 1 CONT
L'origine physique de ce blocage (lock-in) des oscillations [gyromètre laser] tient à ce qu'une partie de chacun des rayonnements se déplaçant dans un sens donné est renvoyée dans l'autre sens; ce renvoi est notamment dû aux irrégularités de surface des miroirs et aux variations d'indice de ces miroirs. Ce phénomène est représenté par le terme générique de rétrodiffusion (back-scattering). 2, record 3, French, - r%C3%A9trodiffusion
Record number: 3, Textual support number: 2 CONT
La structure simple du gyrolaser lui confère une excellente fiabilité et une bonne précision [...] Les défauts de surface des miroirs, même infimes, provoquent la rétrodiffusion d'une partie de chaque rayon qui se couple alors avec le rayon se propageant dans l'autre sens. Il se crée ainsi un couplage (lock-in) entre les faisceaux lasers et une zone aveugle pour les vitesses angulaires faibles. 3, record 3, French, - r%C3%A9trodiffusion
Record 3, Spanish
Record 3, Textual support, Spanish
Record 4 - internal organization data 1996-05-06
Record 4, English
Record 4, Subject field(s)
- Photoelectricity and Electron Optics
- Optical Telecommunications
Record 4, Main entry term, English
- pigtailed module 1, record 4, English, pigtailed%20module
Record 4, Abbreviations, English
Record 4, Synonyms, English
Record 4, Textual support, English
Record number: 4, Textual support number: 1 CONT
Discrete modules, which allow the coupling of the optoelectronic laser and photo-detector chips to optical fibers(typically named "pigtailed" modules), are used as basic building blocks for the SDH optical interfaces. 1, record 4, English, - pigtailed%20module
Record number: 4, Textual support number: 1 OBS
optoelectronics 2, record 4, English, - pigtailed%20module
Record 4, French
Record 4, Domaine(s)
- Photo-électricité et optique électronique
- Télécommunications optiques
Record 4, Main entry term, French
- module à fibre amorce
1, record 4, French, module%20%C3%A0%20fibre%20amorce
masculine noun
Record 4, Abbreviations, French
Record 4, Synonyms, French
Record 4, Textual support, French
Record number: 4, Textual support number: 1 CONT
Les modules discrets, qui permettent le couplage du laser et du photodétecteur aux fibres optiques (et qui sont appelés modules à fibre amorce), sont les éléments de base des interfaces optiques SDH. 1, record 4, French, - module%20%C3%A0%20fibre%20amorce
Record 4, Spanish
Record 4, Textual support, Spanish
Record 5 - internal organization data 1989-02-10
Record 5, English
Record 5, Subject field(s)
- Lasers and Masers
Record 5, Main entry term, English
- output strong coupling laser
1, record 5, English, output%20strong%20coupling%20laser
correct
Record 5, Abbreviations, English
Record 5, Synonyms, English
Record 5, French
Record 5, Domaine(s)
- Masers et lasers
Record 5, Main entry term, French
- laser à fort couplage de sortie
1, record 5, French, laser%20%C3%A0%20fort%20couplage%20de%20sortie
correct, masculine noun
Record 5, Abbreviations, French
Record 5, Synonyms, French
Record 5, Textual support, French
Record 5, Spanish
Record 5, Textual support, Spanish
Record 6 - internal organization data 1989-02-10
Record 6, English
Record 6, Subject field(s)
- Lasers and Masers
Record 6, Main entry term, English
- strong coupling laser
1, record 6, English, strong%20coupling%20laser
correct
Record 6, Abbreviations, English
Record 6, Synonyms, English
Record 6, French
Record 6, Domaine(s)
- Masers et lasers
Record 6, Main entry term, French
- laser à fort couplage
1, record 6, French, laser%20%C3%A0%20fort%20couplage
correct, masculine noun
Record 6, Abbreviations, French
Record 6, Synonyms, French
Record 6, Textual support, French
Record 6, Spanish
Record 6, Textual support, Spanish
Record 7 - internal organization data 1989-02-10
Record 7, English
Record 7, Subject field(s)
- Lasers and Masers
Record 7, Main entry term, English
- output coupling laser
1, record 7, English, output%20coupling%20laser
correct
Record 7, Abbreviations, English
Record 7, Synonyms, English
Record 7, French
Record 7, Domaine(s)
- Masers et lasers
Record 7, Main entry term, French
- laser à couplage de sortie
1, record 7, French, laser%20%C3%A0%20couplage%20de%20sortie
correct, masculine noun
Record 7, Abbreviations, French
Record 7, Synonyms, French
Record 7, Textual support, French
Record 7, Spanish
Record 7, Textual support, Spanish
Record 8 - internal organization data 1987-02-27
Record 8, English
Record 8, Subject field(s)
- Lasers and Masers
Record 8, Main entry term, English
- laser coupling
1, record 8, English, laser%20coupling
correct
Record 8, Abbreviations, English
Record 8, Synonyms, English
Record 8, French
Record 8, Domaine(s)
- Masers et lasers
Record 8, Main entry term, French
- couplage par laser
1, record 8, French, couplage%20par%20laser
correct, masculine noun
Record 8, Abbreviations, French
Record 8, Synonyms, French
Record 8, Textual support, French
Record 8, Spanish
Record 8, Textual support, Spanish
Record 9 - internal organization data 1985-05-17
Record 9, English
Record 9, Subject field(s)
- Lasers and Masers
Record 9, Main entry term, English
- coupling laser
1, record 9, English, coupling%20laser
correct
Record 9, Abbreviations, English
Record 9, Synonyms, English
Record 9, French
Record 9, Domaine(s)
- Masers et lasers
Record 9, Main entry term, French
- laser à couplage
1, record 9, French, laser%20%C3%A0%20couplage
correct, masculine noun
Record 9, Abbreviations, French
Record 9, Synonyms, French
Record 9, Textual support, French
Record 9, Spanish
Record 9, Textual support, Spanish
Record 10 - internal organization data 1985-05-17
Record 10, English
Record 10, Subject field(s)
- Lasers and Masers
Record 10, Main entry term, English
- taper coupling laser
1, record 10, English, taper%20coupling%20laser
correct
Record 10, Abbreviations, English
Record 10, Synonyms, English
Record 10, French
Record 10, Domaine(s)
- Masers et lasers
Record 10, Main entry term, French
- laser à couplage à courbe de répartition
1, record 10, French, laser%20%C3%A0%20couplage%20%C3%A0%20courbe%20de%20r%C3%A9partition
masculine noun
Record 10, Abbreviations, French
Record 10, Synonyms, French
Record 10, Textual support, French
Record 10, Spanish
Record 10, Textual support, Spanish
Copyright notice for the TERMIUM Plus® data bank
© Public Services and Procurement Canada, 2025
TERMIUM Plus®, the Government of Canada's terminology and linguistic data bank
A product of the Translation Bureau
Features
Language Portal of Canada

Access a collection of Canadian resources on all aspects of English and French, including quizzes.
Writing tools

The Language Portal’s writing tools have a new look! Easy to consult, they give you access to a wealth of information that will help you write better in English and French.
Glossaries and vocabularies

Access Translation Bureau glossaries and vocabularies.
- Date Modified: