Acousto-optical modulator driving circuit and scanning method thereof
An acousto-optic modulator and drive circuit technology, which is applied in instruments, optics, nonlinear optics, etc., and can solve problems such as inability to switch or scan frequency and amplitude
Inactive Publication Date: 2016-12-07
UNIV OF SCI & TECH OF CHINA
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[0005] In view of this, the present invention provides an acousto-optic modulator drive circuit and its scanning method to solve the problem that the sine wave electric signal drive circuit in the prior art cannot switch or scan flexibly and quickly the frequency and amplitude
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[0048] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
[0049]The acousto-optic modulator is composed of an acousto-optic medium and a piezoelectric transducer. When a specific carrier frequency of the acousto-optic modulator drive source drives the transducer, the transducer generates ultrasonic waves of the same frequency and transmits them to the acousto-optic medium. , A change in the refractive index is formed in the medium, and when the light beam passes through the medium, it interacts to change the propagati...
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The invention provides an acousto-optical modulator driving circuit and a scanning method thereof. The driving circuit comprises a controller, a phase locked loop, a direct digital synthesizer, a digital to analogue converter and a variable gain amplifier module; the variable gain amplifier module is additionally arranged at the output end of the direct digital synthesizer and the output end of the digital to analogue converter, the variable gain amplifier module can amplify the amplitude of a signal output by the direct digital synthesizer, the amplification factor is controlled by output of the digital to analogue converter simultaneously, the situation that the frequency value and amplitude value of the output signal of the acousto-optical modulator driving circuit can be adjusted is achieved, and by means of control of the controller, the driving circuit can flexibly and rapidly conduct switching or scanning or other operations on the frequency and amplitude of the output signal. The scanning method is based on the scanning circuit, according to the scanning method, different scanning spots can be preset or customized, and therefore more scanning modes are provided.
Description
technical field [0001] The invention relates to the field of signal generators, in particular to an acousto-optic modulator drive circuit and a scanning method thereof. Background technique [0002] Cold atoms and ultracold atoms provide a very ideal microscopic quantum state, which occupies an important position in quantum physics and quantum information related experiments. In the field of cold atom experiments, such as quantum storage, superfluidity, optical lattice and other experiments, acousto-optical modulators (Acousto-optical Modulators, abbreviated as AOM) play an important role. , phase and other parameters, and then affect and manipulate the quantum state of cold atoms through the interaction mechanism between light and atoms. [0003] The acousto-optic modulator needs a sine wave electrical signal drive circuit to drive. Because the various characteristics of cold atoms are very fine, there are relatively high requirements for the frequency resolution, precisi...
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IPC IPC(8): G02F1/11
CPCG02F1/113
Inventor 江晓黎娜潘建伟
Owner UNIV OF SCI & TECH OF CHINA