Optoelectronic oscillator based on semiconductor multi-longitudinal mode laser

Abstract

The invention discloses a photoelectric oscillator based on a semiconductor multi-longitudinal mode laser. A photoelectric transfer modulation module (2) comprises an optical coupler (3), a photoelectric probe (4), an electric coupler (5), a photoelectric modulator (6) and an optical coupler (7). The output end of the optical coupler (3) is respectively connected with the input ends of the photoelectric probe (4) and the photoelectric modulator (6). The output end of the photoelectric probe (4) is connected with the input end of the electric coupler (5), and one output end of the electric coupler (5) is connected with a drive input end of the photoelectric modulator (6). The electric coupler (5) is provided with another output end. The output end of the photoelectric modulator (6) is connected with the input end of the optical coupler (7). The optical coupler (7) is provided with an optical signal output end and a feedback end connected with the semiconductor multi-longitudinal mode laser (1). The output end of the semiconductor multi-longitudinal mode laser (1) is connected with the input end of the optical coupler (3). The photoelectric oscillator based on the semiconductor multi-longitudinal mode laser is simple in structure, low in cost and convenient to use, and the frequency is tunable.

Description

technical field [0001] The invention relates to the fields of microwave technology and optoelectronic technology, in particular to a photoelectric oscillator. Background technique [0002] An optoelectronic oscillator (OEO: Optoelectronic Oscillator) is an optical and electrical microwave / millimeter wave signal generating device. Its basic structure is to use a feedback loop composed of a light source, an electro-optic modulator, a photodetector, and an electric filter, and use the energy storage capacity of a long optical fiber to generate high-quality optical and electrical microwave signals. At present, the OEO system still needs to be improved in terms of practicability. The main problem is that although there are alternatives for each part of the system, most of them are independent of each other and difficult to integrate, so it is not easy to optimize from the perspective of system structure and cost; Long optical fibers can store more light field energy in the loop ...

AI Technical Summary

Problems solved by technology

At present, the OEO system still needs to be improved in terms of practicability. The main problem is that although there are alternatives for each part of the system, most of them are independent of each other and difficult to integrate, so it is not easy to optimize from the perspective of system structure and cost; Long optical fibers can store more light field energy in the loop and improve the quality of the generated signal, but this also brings about the problem that the system is bulky, easily affected by the external environment, and side-mode noise is difficult to be filtered out by the filter. Therefore, how to simplify the system and reduce costs under the premise of ensuring performance is the key to the practical application of OEO

However, the multi-loop structure is complex and requires the use of long optical fibers, which makes the entire OEO system bulky and difficult to control stability;

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