Patent
Optical device frequency response measurement apparatus and method
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TLDR
In this paper, an optical device frequency response measurement method and a system is described, in which an optical carrier wave signal of a single wavelength is input into a frequency shift module with a carrier wave so that an optical detection signal with an optical detector and a radio frequency component is acquired; after the signal passes through a device to be detected, the radio frequency signal is acquired through a beat frequency of the optical detection module.Abstract:
The invention discloses an optical device frequency response measurement method and a system. The method is characterized in that an optical carrier wave signal of a single wavelength is input into a frequency shift module with a carrier wave so that an optical detection signal with a carrier wave component and a frequency shift component is acquired; after the signal passes through a device to be detected, a radio frequency signal is acquired through a beat frequency of an optical detection module; a radio frequency amplitude phase extraction module whose working frequency is the same with a frequency shift amount is used to extract an amplitude and a phase information of the radio frequency signal so that combination amplitude frequency response and phase frequency response of an optical device to be detected at two frequency component positions of the optical detection signal are obtained; through calculation, the amplitude frequency response and the phase frequency response at the two frequency component positions are acquired respectively; a wavelength of the optical carrier wave signal is changed and the above processes are repeated so that frequency response of the optical device to be detected is acquired. The invention also discloses an optical device frequency response measurement system. Compared to the prior art, by using the method and the system, the amplitude phase extraction module is only requested to measure a fixed single frequency point so that cost is greatly reduced and simultaneously a bandpass device can be measured.read more
Citations
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References
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Patent
Light measuring apparatus
TL;DR: In this paper, a phase distribution modulator is installed on an optical path before a sample arrangement part, and a beam of signal light is divided into a plurality of regions whose phases are different and their phase patterns are changed sequentially in terms of time.
Journal ArticleDOI
Measurement of optical magnitude response based on double-sideband modulation
TL;DR: A novel approach to perform high-resolution optical magnitude response measurements, using optical double-sideband (ODSB) modulation, is proposed and experimentally demonstrated and features not only simple configuration and doubled measurement range, but also immunity to modulation nonlinearity.
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Optical device measuring method and device based on double sideband modulation
TL;DR: In this paper, an optical double sideband modulation method is used to modulate a radio frequency signal to a first optical carrier signal, so as to generate a double side-band modulation signal.
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Optical single-side band modulation based optical device measuring method and optical single-side band modulation based optical device measuring device
TL;DR: By substituting a narrow linewidth laser with fixed output wavelength in an original measuring device by two tunable narrow-width lasers which are connected in parallel and utilizing the method of controlling the two lasers to operate alternatively, the measuring range of the optical single-side band measuring technology is widened from 0.4nm to 40nm or above as discussed by the authors.
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Optical device measuring method and measuring device
TL;DR: In this paper, an optical device measuring method based on the unilateral modulation of light (UML) was proposed, in which a microwave signal with fixed frequency and phase is modulated to a light carrier which is output by a light source through an optical frequency comb modulator, and the broadband transmission functions of the optical device are obtained according to the transmission functions in the frequency bands which correspond to a plurality of continuous comb teeth.