Free spectral range measurement of fabry-perot cavity using frequency modulation

Aketagawa, Masato; Yashiki, Takuya; Kimura, Shohei; Banh, Tuan Quoc

doi:10.1007/s12541-010-0103-3

Cited by 8 publications

(6 citation statements)

References 18 publications

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“…The contributors are the free spectral ranges (FSR) of the first and second reference FPIs, being 0.6 nm and 1.7 nm respectively. The FSR of a single FPI can be calculated from the following expression 29 :…”

Section: Resultsmentioning

confidence: 99%

Photodetector based on Vernier-Enhanced Fabry-Perot Interferometers with a Photo-Thermal Coating

Chen

Liu

et al. 2017

Sci Rep

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We present a new type of fiber-coupled photodetector with a thermal-based optical sensor head, which enables it to operate even in the presence of strong electro-magnetic interference and in electrically sensitive environments. The optical sensor head consists of three cascaded Fabry-Perot interferometers. The end-face surface is coated with copper-oxide micro-particles embedded in hydrogel, which is a new photo-thermal coating that can be readily coated on many different surfaces. Under irradiation, photons are absorbed by the photo-thermal coating, and are converted into heat, changing the optical path length of the probing light and induces a resonant wavelength shift. For white-light irradiation, the photodetector exhibits a power sensitivity of 760 pm/mW, a power detection limit of 16.4 μW (i.e. specific detectivity of 2.2 × 105 cm.√Hz/W), and an optical damage threshold of ~100 mW or ~800 mW/cm2. The response and recovery times are 3.0 s (~90% of change within 100 ms) and 16.0 s respectively.

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Section: Resultsmentioning

confidence: 99%

Photodetector based on Vernier-Enhanced Fabry-Perot Interferometers with a Photo-Thermal Coating

Chen

Liu

et al. 2017

Sci Rep

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“…To improve the spectral resolution, the narrow slits are always used in these instruments, which will block some portions of the light beam and then the optical signals cannot be efficiently used. The free spectral region of these high-resolution spectrometers is also much narrow, which increases the difficulties for measured the unambiguous wavelengths 12,13,14,15,16,17,18,19 . The triangular prism working as a light-splitting element has attract continuously attention since the first demonstration of refraction and dispersion in this prism, which was performed by British physicist Sir Isaac Newton in the late 1600s 20 .…”

Section: Introductionmentioning

confidence: 99%

Planar photonic chips with tailored dispersion relations for high-efficient spectrographic devices

Chen¹,

Fan

Sun

et al. 2023

Preprint

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Spectral characterizations play the important roles in both scientific research and industry. Now, there is a growing demand for spectrometers that have the merits of miniaturized size, high-efficiency, and high spectral resolution. Here, a planar photonic chip containing a photonic band gap (PBG) with tailored dispersion relations is proposed to work as a high-efficient compact spectrographic device, taking advantages of its loading Bloch surface waves (BSWs). When this chip was attached to a prism, the angular dispersion power of the low-loss BSWs enhances the spectra resolving ability of this prism without any need for inversion algorithms or physical slits, thus resulting in high efficiency in utilizing the optical signals and retrieving the spectra. The spectra of various source, such as laser, white light, fluorescence emission, and even the Raman scattering light are characterized with the compact high-efficient spectrographic devices. The achieved spectral resolution can be as high as 0.6 nm.

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“…In the recent literature, particularly in the field of gravitational wave detectors, several techniques have been proposed to measure the FSR of long linear cavities. In particular, Araya et al [15] measured the absolute length of an approximately 300 m long Fabry-Pérot cavity by FSR measurement, using two EOM for frequency modulation and attaining a measurement uncertainty of 10 −8 ; Aketagawa et al [16] measured the FSR of an approximately 0.170 m long cavity using a single EOM with an uncertainty of 10 −6 . For a more detailed list of developed techniques, see also [17].…”

Section: Introductionmentioning

confidence: 99%

Interferometric length metrology for the dimensional control of ultra-stable ring laser gyroscopes

Belfi

Beverini

Cuccato

et al. 2014

Class. Quantum Grav.

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We present the experimental test of a method for controlling the absolute length of the diagonals of square ring laser gyroscopes. The purpose is to actively stabilize the ring cavity geometry and to enhance the rotation sensor stability in order to reach the requirements for the detection of the relativistic Lense-Thirring effect with a ground-based array of optical gyroscopes. The test apparatus consists of two optical cavities 1.32 m in length, reproducing the features of the ring cavity diagonal resonators of large frame He-Ne ring laser gyroscopes. The proposed measurement technique is based on the use of a single diode laser, injection locked to a frequency stabilized He-Ne/Iodine frequency standard, and a single electro-optic modulator. The laser is modulated with a combination of three frequencies allowing to lock the two cavities to the same resonance frequency and, at the same time, to determine the cavity Free Spectral Range (FSR). We obtain a stable lock of the two cavities to the same optical frequency reference, providing a length stabilization at the level of 1 part in 10 11 , and the determination of the two FSRs with a relative precision of ∼ 2 · 10 −7 . This is equivalent to an error of 500 nm on the absolute length difference between the two cavities.

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Free spectral range measurement of fabry-perot cavity using frequency modulation

Cited by 8 publications

References 18 publications

Photodetector based on Vernier-Enhanced Fabry-Perot Interferometers with a Photo-Thermal Coating

Photodetector based on Vernier-Enhanced Fabry-Perot Interferometers with a Photo-Thermal Coating

Planar photonic chips with tailored dispersion relations for high-efficient spectrographic devices

Interferometric length metrology for the dimensional control of ultra-stable ring laser gyroscopes

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