Optical local oscillator generation system and method
A technology for generating systems and local oscillator lasers, applied in the field of microwave photonics, can solve problems such as high system complexity, difficulty in eliminating channel crosstalk, and limited frequency range
Active Publication Date: 2021-11-02
CHINA ACADEMY OF SPACE TECHNOLOGY
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Problems solved by technology
However, the frequency range of the received signal is limited by the tooth interval of the carrier optical frequency comb. To cover the entire UWB frequency range at the same time requires a large number of comb teeth. The traditional electro-optical modulation method is difficult to implement, and the system complexity is high and it is difficult to eliminate the gap between channels. crosstalk
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[0031] Various exemplary embodiments, features, and aspects of the invention will be described in detail below with reference to the accompanying drawings. The same reference numbers in the figures indicate functionally identical or similar elements. While various aspects of the embodiments are shown in drawings, the drawings are not necessarily drawn to scale unless specifically indicated.
[0032] The word "exemplary" is used exclusively herein to mean "serving as an example, embodiment, or illustration." Any embodiment described herein as "exemplary" is not necessarily to be construed as superior or better than other embodiments.
[0033] In addition, in order to better illustrate the present invention, numerous specific details are given in the specific embodiments below. It will be understood by those skilled in the art that the present invention may be practiced without certain of the specific details. In some instances, methods, means, components and circuits well kn...
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The present invention relates to an optical local oscillator generating system and method. The system includes: a carrier laser, used to generate carrier laser; a local oscillator laser, used to generate local oscillator laser; a low-frequency reference source, used to provide a low-frequency reference signal; a multiplexing unit, It is used to obtain multiple optical local oscillators with predetermined frequency intervals according to the local oscillator laser, and to select and configure multiple optical local oscillators; a phase-locked loop is used to connect the carrier laser with the target when the first signal meets the predetermined condition The offset frequency of the optical local oscillator is phase-locked; the control unit is used to tune the frequency of the low-frequency reference source to tune the magnitude of the offset frequency. When the first signal meets a predetermined condition, the carrier laser and the local oscillator laser Phase locking of the phase at the tuned new frequency position; and when the first signal does not meet the predetermined condition, adjust the frequencies of the carrier laser and the local oscillator laser so that the first signal meets the predetermined condition. Thus, large-scale dynamic tuning of the optical local oscillator is realized.
Description
technical field [0001] The invention relates to the technical field of microwave photonics, in particular to an optical local oscillator generation system and method. Background technique [0002] Tunable optical local oscillators are widely used in ultra-broadband photon reception, coherent optical communication, ultra-broadband photon radar, precision measurement, quantum communication, high-resolution spectroscopy and other fields. Taking the receiver as an example, the current receiver system is developing in the direction of wide frequency band, large instantaneous bandwidth, and multifunctional reconfigurability. In the receiver system, local oscillator generation is one of the most core parts. For ultra-wideband receivers, the frequency tuning range and accuracy of the local oscillator determine the operating frequency range and frequency tuning accuracy of the entire receiver. The local oscillator signal The quality determines the quality of the IF signal after down...
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IPC IPC(8): H01S3/067H04B10/61
CPCH01S3/06754H04B10/616
Inventor 梁启军高光宇彭焕发刘乃金
Owner CHINA ACADEMY OF SPACE TECHNOLOGY