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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02 Mar 2005
TL;DR: In this article, a semiconductor laser gyro comprising a laser and a photodetector was proposed, where interference fringes were formed by the first and second laser lights and the second laser light was a part of the first laser light circulating on a polygonal passage in the active layer.
Abstract: A semiconductor laser gyro comprising a semiconductor laser (10) emitting first and second laser lights and a photodetector which is located at such a position that interference fringes are formed by the first and second laser lights. The semiconductor laser (10) comprises an active layer, and first and second electrodes (13, 14) for injecting carriers into the active layer. The first laser light is a part of laser light (L1) circulating on a polygonal passage in the active layer, and the second laser light is a part of laser light (L2) circulating on that passage reversely to the first laser light (L1).
2 citations
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TL;DR: In this article, the authors presented a laser inertial rotation sensor with a laser-inertial rotational sensor, which they called LIR-Sensors (LIR-RSS).
Abstract: (1980). Laser Inertial Rotation Sensors. Optica Acta: International Journal of Optics: Vol. 27, No. 4, pp. 445-446.
2 citations
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TL;DR: In this paper , the frequency lock-in phenomenon occurring in the ring laser gyroscopes was successfully investigated by compensating for the Sagnac effect through frequency analysis using a newly defined error function.
Abstract: Frequency lock-in-induced deadband phenomena are major problems of ring laser gyroscopes (RLGs), which deteriorate linear responses to changes in the applied rotation rate. In this work, the frequency lock-in phenomenon occurring in the RLG was successfully investigated by compensating for the Sagnac effect through frequency analysis using a newly defined error function. Integrative and generalized viewpoints from the analyzed results provide new possibilities for relevant performance improvements of optical gyroscopes, as well as a deeper understanding of locked states in principle aspects.
2 citations
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18 Jan 1990
TL;DR: In this article, a photodiode 28 having segments F1-F4 is arranged in parallel with fringes, and the outputs of the segments F 1-F 4 are connected to the corresponding inputs of photoelectric current amplifiers PA1-PA4.
Abstract: PURPOSE: To make it possible to detect a fringe pattern and to monitor an output level, by using a photodiode to be split into four segments for each axis of a three-axis ring laser gyroscope, synthesizing the outputs from the segments and using proper electric circuits. CONSTITUTION: A photodiode 28 having segments F1-F4 is arranged in parallel with fringes, and the outputs of the segments F1-F4 are connected to the corresponding inputs of photoelectric current amplifiers PA1-PA4. The outputs of the amplifiers PA1 and PA3 are sent to a differential amplifier DA1, and the outputs of the amplifiers PA2 and PA4 are sent to the input of a differential amplifier DA2. And the outputs of the amplifiers PA2 and DA2 are sent to voltage comparators VC1 and VC2 respectively. The amplifiers DA1 and DA2 measure the output signal difference of respective pairs of photoelectric current amplifiers and give the difference signals to the comparators VC1 and VC2, and the comparators operate as analog-to-digital voltage converters which sent logic signals to a flip-flop 32. Consequently, the output of this part of the circuit can give a magnitude obtained at A and the direction of a fringe pattern displayed at Q.
2 citations