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Titolo:
Beat frequencies in a ring laser gyro with its refractive index ever unity
Autore:
Numai, T;
Indirizzi:
Canon Res Ctr, Kanagawa 2430193, Japan Canon Res Ctr Kanagawa Japan 2430193 on Res Ctr, Kanagawa 2430193, Japan
Titolo Testata:
JOURNAL OF APPLIED PHYSICS
fascicolo: 3, volume: 89, anno: 2001,
pagine: 1537 - 1543
SICI:
0021-8979(20010201)89:3<1537:BFIARL>2.0.ZU;2-B
Fonte:
ISI
Lingua:
ENG
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
--discip_EC--
Citazioni:
11
Recensione:
Indirizzi per estratti:
Indirizzo: Numai, T Canon Res Ctr, 5-1 Morinosato Wakamiya, Kanagawa 2430193, Japan Canon Res Ctr 5-1 Morinosato Wakamiya Kanagawa Japan 2430193 pan
Citazione:
T. Numai, "Beat frequencies in a ring laser gyro with its refractive index ever unity", J APPL PHYS, 89(3), 2001, pp. 1537-1543

Abstract

A frequency shift Deltaf during rotation in a ring laser gyro with its refractive index of unity was already well known. However, when the refractiveindex n(r) is over unity, several expressions for a beat frequency such as2 Deltaf proportional ton(r), n(r)(0), n(r)(-1), and n(r)(-2) were proposed. In this article, a beat frequency in a uniformly rotating ring laser gyro with n(r)>1 is calculated using nonrelativistic, special relativistic, and general relativistic theories. To the first order, all the results obtained from these theories show a common beat frequency, which is proportional to the refractive index n(r), as far as the dispersion is neglected. When the dispersion is considered, the beat frequency is in proportion to n(r0)[1- (r Omega/lambda (0))(2)(dn(r)/dnf)(2)](-1), where f is a frequency of a laser beam, lambda (0) is a wavelength of a laser beam when the ring laser stands still, and n(r0) is a refractive index at lambda (0). If n(r0) = 1 -(r Omega/lambda (0))(2)(dn(r)/df)(2) is satisfied, the beat frequency seemsto be independent of the refractive index. (C) 2001 American Institute of Physics.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 28/09/20 alle ore 17:21:51