Observation of a highly phase-correlated chirped frequency comb output from a frequency-shifted feedback laser

Nakamura, Koichiro; Miyahara, T.; Ito, Hiromasa

doi:10.1063/1.121438

Cited by 28 publications

(18 citation statements)

References 9 publications

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“…Interestingly, these beatings also occur for path delays of orders of magnitude larger than the coherence time of the laser, and even larger than the photon cavity lifetime in the cavity; that is when the optical field has lost all memory [6]. This leads to the question whether these beatings are still observable between identical but distinct FSF lasers, between which no optical coherence of any kind exists.…”

mentioning

confidence: 99%

Heterodyne beatings between frequency-shifted feedback lasers

et al. 2012

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Frequency-shifted feedback (FSF) lasers are potential candidates for long distance telemetry due to the appearance of beatings in the noise spectrum at the output of a homodyne interferometer: the frequencies of these beatings vary linearly with the path delay. In this Letter we demonstrate that these beatings also occur in the heterodyne mixing of two identical, but distinct, FSF lasers. This phenomenon is explained by the passive cavity model and is exploited to characterize the time-spectrum properties of FSF lasers. Consequences on telemetry with FSF lasers are presented.

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confidence: 99%

Heterodyne beatings between frequency-shifted feedback lasers

et al. 2012

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“…The latter work triggered similar experimental and theoretical efforts in Kaiserslautern [13,14,15,16] and later in Sendai [17,18]. In parallel, the group of T. Hänsch continued to further develop the scheme as a means for tuning laser wavelength [19] or bandwidth control [20].…”

Section: The Fsf Laser Conceptmentioning

confidence: 95%

Ranging with frequency-shifted feedback lasers: from $$\upmu$$ μ m-range accuracy to MHz-range measurement rate

Kim¹,

Ogurtsov²,

Bonnet³

et al. 2016

Appl. Phys. B

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We report results on ranging based on frequency shifted feedback (FSF) lasers with two different implementations: (1) An Ytterbium-fiber system for measurements in an industrial environment with accuracy of the order of 1 µm, achievable over a distance of the order of meters with potential to reach an accuracy of better than 100 nm; (2) A semiconductor laser system for a high rate of measurements with an accuracy of 2 mm @ 1 MHz or 75 µm @ 1 kHz and a limit of the accuracy of ≥ 10 µm. In both implementations, the distances information is derived from a frequency measurement.The method is therefore insensitive to detrimental influence of ambient light. For the Ytterbium-fiber system a key feature is the injection of a single frequency laser, phase modulated at variable frequency Ω, into the FSFlaser cavity. The frequency Ω max at which the detector signal is maximal yields the distance. The semiconductor FSF laser system operates without external injection seeding. In this case the key feature is frequency counting that allows convenient choice of either accuracy or speed of measurements simply by changing the duration of the interval during which the frequency is measured by counting.

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“…When the wavelength variation is large enough, for example some nanometers, wavemeters can be used for measurement. When the wavelength variation is relatively small (<0.1nm), the resolution of wavemeters is not adequate for the frequency change measurement, and therefore other instruments such as Fabry-Perot interferometer 6, 7 , Self-heterodyne interferometry [8][9][10][11] , and Michelson interferometer 12,13 are applied. In measurement using a Fabry-Perot etalon with known cavity space 6 , the transmitted power reach its maximum when the laser is tuned to the resonant condition of the etalon.…”

Section: Introductionmentioning

confidence: 99%

“…It allows great sensitivity and high precision, but the alignment procedure is laborious and time-consuming. The Self-heterodyne interferometer is too employed to measure frequency-chirped responses of chirped laser 9,10 . In this method, the laser beam is split into two beams.…”

Section: Introductionmentioning

confidence: 99%

Method to measure frequency change of tunable laser based on Jamin shearing interferometer

et al. 2009

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A method to measure the frequency change of the tunable laser based on a Jamin shearing interferometer is proposed.The Jamin shearing interferometer is composed of two Jamin plates, two shearing plates and a retardation plate. The tunable laser beam is split into two beams by one Jamin plate. The retardation plate is placed in one of two beams to provide additional phase retardation. Two beams pass two shearing plates, respectively, and are combined by the other Jamin plate to form lateral shearing interferogram. In course of tuning, interference fringes are shifted as a whole and its spacing is kept constant. By detecting displacement of fringes, the frequency change of the laser is obtained. In experiments，we observed that interference fringes were shift periodically when the laser diode was modulated sinusoidally. A series of interferogram in which fringes are shifted as a whole with the variation of the frequency are obtained. The feasibility of the method is verified.

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Observation of a highly phase-correlated chirped frequency comb output from a frequency-shifted feedback laser

Cited by 28 publications

References 9 publications

Heterodyne beatings between frequency-shifted feedback lasers

Heterodyne beatings between frequency-shifted feedback lasers

Ranging with frequency-shifted feedback lasers: from $$\upmu$$ μ m-range accuracy to MHz-range measurement rate

Method to measure frequency change of tunable laser based on Jamin shearing interferometer

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