Topic
Ring laser gyroscope
About: Ring laser gyroscope is a research topic. Over the lifetime, 2070 publications have been published within this topic receiving 18609 citations. The topic is also known as: Sagnac interferometer.
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TL;DR: In this article, a simply multiple-wavelength erbium compound ring fiber laser employing a Sagnac interferometer with EDFA and Fabry-Perot laser diode was proposed.
Abstract: We propose and demonstrate experimentally a simply multiple-wavelength erbium compound ring fiber laser employing a Sagnac interferometer with erbium-doped fiber amplifier (EDFA) and Fabry-Perot laser diode (FP-LD). The proposed laser has the advantage of simply structure and easy fabrication, lower insertion loss and cost-effective. Based on the Sagnac fiber laser scheme, the proposed laser can lase eight wavelengths simultaneously. Moreover, the optical output stability of the ring laser has been also discussed.
56 citations
Patent•
25 Jun 1979TL;DR: In this paper, a four-frequency laser gyroscope system with improved accuracy is constructed using a single solid block of low thermal coefficient of expansion material, and a foursegment nonplanar propagation path provides a first frequency splitting.
Abstract: A four-frequency laser gyroscope system having improved accuracy is constructed using a single solid block of low thermal coefficient of expansion material. A four-segment nonplanar propagation path provides a first frequency splitting. A second splitting is provided by a Faraday rotator having a thin slab of rare earth-doped glass positioned within an aperture in a permanent magnet. A narrow angle of incidence is provided for the beams of incident upon the output mirror to prevent cross coupling between beams within the output optics structure. Blocking the gaseous flow path reduces output frequency drift caused by contamininating particles.
55 citations
TL;DR: With servoing of the rf excitation to yield single-mode operation, G0 gave a quality factor 1 x 10(12) and a Sagnac line with a frequency of 287.8 +/- 1.0 Hz induced by Earth rotation Omega(E).
Abstract: The design and initial operation of a vertical square He-Ne ring laser G0 with a perimeter of 14 m is discussed. This builds on earlier demonstrations of the feasibility of large ring lasers (perimeter approximately 4 m) for single-mode gyroscope operation and with lesser pulling than navigation gyroscopes. With servoing of the rf excitation to yield single-mode operation, G0 gave a quality factor 1 x 10(12) and a Sagnac line with a frequency of 287.8 +/- 1.0 Hz induced by Earth rotation Omega(E). This has confirmed some vital questions over the feasibility of very large gyroscopes for geodetic measurements at the level of 10(-9) Omega(E).
55 citations
TL;DR: Theoretical and experimental investigations of a closed-loop fiber-optic gyroscope are reported and the influence of a finite flyback period on the scale factor is investigated.
Abstract: Theoretical and experimental investigations of a closed-loop fiber-optic gyroscope are reported. Phase nulling is accomplished by applying a sawtooth modulation to an integrated-optic phase modulator located at one side of the sensing loop. The frequency of the phase modulation is proportional to the rotation rate, thus permitting a digital readout. The influence of a finite flyback period on the scale factor is investigated.
55 citations
TL;DR: In this article, the effect of rotation on the propagation of electromagnetic waves in optical microcoil resonator structures was studied and it was shown that the combination of slow light and conventional propagation mechanisms leads to an enhancement of orders of magnitudes of the Sagnac phase shift and can be used for the realization of highly compact optical rotation sensors and gyroscopes.
Abstract: We study the effect of rotation on the propagation of electromagnetic waves in optical microcoil resonator structures. It is shown that the combination of slow-light and conventional propagation mechanisms leads to an enhancement of orders of magnitudes of the Sagnac phase shift and can be used for the realization of highly compact optical rotation sensors and gyroscopes.
54 citations