TERMIUM Plus^®

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,  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,  Textual support,  Spanish

Record 2,  Textual support,  English

Record number: 2, Textual support number: 1 DEF

One half of the absolute value of the algebraic difference between the two rates defining the region over which lock-in occurs.  2, record 2, English, - lock%2Din%20rate

Record number: 2, Textual support number: 1 OBS

lock-in : The phenomenon exhibited by laser gyros that is characterized by frequency locking of the clockwise and counterclockwise beams at low input rates.  2, record 2, English, - lock%2Din%20rate

Record 2,  Textual support,  French

Record number: 2, Textual support number: 1 OBS

Voir la fiche «blocage; couplage / lock-in».  2, record 2, French, - taux%20de%20blocage

Record 2,  Textual support,  Spanish

Record 3,  Textual support,  English

Record number: 3, Textual support number: 1 CONT

In order to achieve a stable long term operation without frequent calibrations, the wavelength of the transmitter laser is locked to the iodine absorption peak. Wavelength locking to the Doppler-broadened iodine absorption line was used because it requires much less power than a locking into a hyperfine structure of the iodine absorption line with Doppler-free technique. Compared to the wavelength locking with a high resolution etalon, the advantage of the locking to an iodine absorption peak is that, iodine peak provides an absolute frequency reference.  2, record 3, English, - wavelength%20locking

Record 3,  Textual support,  French

Record number: 3, Textual support number: 1 CONT

La LLC est une configuration laser accordable dotée d'une boucle de retour optique permettant le verrouillage en longueur d'onde.  1, record 3, French, - verrouillage%20en%20longueur%20d%27onde

Record 3,  Textual support,  Spanish

Record 4,  Textual support,  English

Record number: 4, Textual support number: 1 DEF

A graph so called, because it contains an infinite number of steps, between any two steps. But naturally, most of the steps have an infinitesimal width, since there is a(countably) infinite number of them on a bounded interval. In practice, the steps having a non-negligible width are those corresponding to frequency locking where the rational number is a ratio between small integers, e. g. 1/1, 1/2, 2/3, etc.  3, record 4, English, - Devil%27s%20staircase

Record number: 4, Textual support number: 1 CONT

The Cantor function describes the distribution of mass along the Cantor bar. Many writers refer to its graph as the Devil’s staircase, because it is odd indeed ... The Cantor staircase is a nondecreasing and non-constant function that is singular in the sense that it is continuous but nondifferentiable. Its derivative vanishes almost everywhere, and its continuous variation manages to occur over a set whose length - i.e.- linear measure - vanishes.  4, record 4, English, - Devil%27s%20staircase

Record 4,  Textual support,  French

Record number: 4, Textual support number: 1 DEF

Graphe fractal en forme d'escalier qui comporte un nombre infini dénombrable de marches ou plateaux entre chacune des valeurs rationnelles de la fonction masse/temps qui le produit.  2, record 4, French, - escalier%20diabolique

Record number: 4, Textual support number: 1 OBS

Les premiers escaliers diaboliques étaient produits à l'aide d'une fonction de Cantor appelée «fonction en escalier». Dans les escaliers de Besicovitch, une très grande proportion du déplacement vertical total s'opère sur un très petit déplacement horizontal. La dimension fractale des plus grands escaliers de Lévy est égale à celle de l'escalier de Cantor, mais dans les plus petits, cette dimension est soit supérieure soit inférieure de beaucoup.  2, record 4, French, - escalier%20diabolique

Record number: 4, Textual support number: 1 PHR

escalier du Diable complet, incomplet.  2, record 4, French, - escalier%20diabolique

Record number: 4, Textual support number: 2 PHR

accrochage en escalier du diable, courbe en escalier du diable, décrochage d'escalier du Diable.  2, record 4, French, - escalier%20diabolique

Record 4,  Textual support,  Spanish

Record 5,  Textual support,  English

Record number: 5, Textual support number: 1 DEF

A technique locking two lasers together by maintaining a constant difference frequency between them.  1, record 5, English, - passive%20stabilization

Record 5,  Textual support,  French

Record 5,  Textual support,  Spanish