Patent
Optical spectrum analyzer
Kazushi Ohishi,Hiroshi Ohta +1 more
TLDR
An optical spectrum analyzer has a deflection section for changing an incidence angle of measured light on a diffraction grating, a plurality of light detection sections for detecting the dispersed measured light and outputting an electric signal responsive to the light strength as mentioned in this paper.Abstract:
An optical spectrum analyzer has a deflection section for changing an incidence angle of measured light on a diffraction grating, a plurality of light detection sections for detecting the dispersed measured light and outputting an electric signal responsive to the light strength, and a signal processing section for finding an optical spectrum of the measured light based on the electric signal from the light detection sections. The light detection sections are arranged along the wavelength dispersion direction of the diffraction grating and output electric signals independently of each other.read more
Citations
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Method and apparatus for estimating a property of a fluid downhole
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Linearized variable-dispersion spectrometers and related assemblies
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References
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Patent
Wavelength division multiplexed device
Bjarke Rose,Thomas Rasmussen,Chaker Khalfaoui,Michael Rasmussen,Jens Bastue,Per Eld Ibsen,Claus Friis Pedersen +6 more
TL;DR: In this article, the authors proposed a wavelength division multiplexed (WDM) device based on a transmission grating spectrometer having at least two diffractive optical elements, which is useful for multiplexing and demultiplexing, channel monitoring, and for adding and dropping channels.
Patent
Method and apparatus for high resolution monitoring of optical signals
Rongqing Hui,Maurice O'Sullivan +1 more
TL;DR: In this article, an interferometer having a periodic frequency response formed of equally spaced narrow-band peaks is used to sweep the entire signal spectrum, incrementally tuned in cycles so that each of its frequency response peaks cyclically scans a particular spectral band of the signal spectrum.
Patent
Grating assisted acousto-optic tunable filter and method
TL;DR: In this paper, an acousto-optic tunable filter and filtering method are disclosed providing for a significantly increased number of available wavelength channels for output, where the filter combines a diffraction grating, the grating vector of which is transverse to light propagation direction, with an ACoustooptic beam deflector, which, by accommodating a narrow spectral bandwidth, provides significantly increased output bandwidth and available wavelengths channels.
Patent
Method and apparatus for compensating waveforms, spectra, and profiles derived therefrom for effects of drift
Michael Andrew Parker,D. Pocker +1 more
TL;DR: In this article, a method and apparatus for compensating waveforms, spectra, and profiles derived therefrom for effects of drift is disclosed, which finds particular utility in the field of electron spectroscopy when the invention is applied to correcting sputter-depth profile analyses for the effects of spectral drift caused by charging in insulating samples.
Patent
Acousto-optic spectral manipulator
Jon W. Carnahan,Brian A. Pelz +1 more
TL;DR: A disperser consists of a chamber housing a diffraction grating in spaced relation to the light source and an entrance slit associated with the chamber for directing light from the source in a light path to be dispersed by the grating.