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Direct modulation distributed feedback semiconductor laser-based photoelectric oscillator

A distributed feedback, optoelectronic oscillator technology, used in semiconductor lasers, lasers, laser parts and other directions, can solve the cost to be reduced, it is difficult to produce microwave filters, high-speed electro-optical modulators and high-Q microwave filters. Expensive and other problems, to achieve the effect of simple and convenient tuning method, simple structure and easy implementation

Inactive Publication Date: 2013-11-20
ARMY ENG UNIV OF PLA
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  • Summary
  • Abstract
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Problems solved by technology

In addition, frequency tunability is an important characteristic of microwave signal sources, but because it is difficult to produce high-Q broadband tunable microwave filters, traditional optoelectronic oscillators only have a frequency tuning range of tens to hundreds of MHz
In addition, high-speed electro-optic modulators and high-Q microwave filters are expensive, and the cost needs to be reduced from the perspective of application

Method used

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  • Direct modulation distributed feedback semiconductor laser-based photoelectric oscillator
  • Direct modulation distributed feedback semiconductor laser-based photoelectric oscillator
  • Direct modulation distributed feedback semiconductor laser-based photoelectric oscillator

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Embodiment Construction

[0022] In order to achieve the above object, the present invention discloses a photoelectric oscillator based on direct modulation distributed feedback semiconductor laser, the photoelectric oscillator includes:

[0023] Distributed feedback semiconductor lasers, on the one hand, are used to realize electro-optical conversion, convert the oscillation frequency of the optoelectronic oscillator into optical signals and then oscillate in the optoelectronic storage cavity, and on the other hand, utilize the characteristic that semiconductor lasers have maximum modulation efficiency at the relaxation oscillation frequency Equivalently realize photon filtering;

[0024] Single-mode fiber, used as a high-Q microwave energy storage element, with a length ranging from several meters to several kilometers;

[0025] The optical splitter is used to select a part of the optical signal carrying the oscillation frequency as the optical signal output of the oscillator according to the preset ...

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Abstract

The invention discloses a direct modulation distributed feedback semiconductor laser-based photoelectric oscillator. The characteristic that a semiconductor laser has maximum modulation efficiency at relaxation oscillation frequency is utilized, and a distributed feedback semiconductor laser is used for simultaneously realizing photoelectric conversion and photonic microwave filtering functions without an additional electro-optic modulator and an additional narrow-band electric filter. The relaxation oscillation frequency of the laser is tuned by tuning the bias current and the working temperature of the laser to finally realize the large-range frequency tuning of the photoelectric oscillator.

Description

technical field [0001] The invention relates to the technical field of photoelectric oscillators, in particular to a broadband frequency tunable photoelectric oscillator based on direct modulation distributed feedback semiconductor lasers. Background technique [0002] In applications such as satellite communications, radar systems, precision instrumentation, and high-precision measurement, microwave signals with high signal quality and adjustable frequency are often required. The so-called signal quality mainly refers to the short-term frequency stability of the microwave signal, that is, phase noise, and the long-term stability, that is, frequency drift. Traditional high-quality microwave signal sources generally use acoustic energy storage elements (such as quartz crystals) or microwave energy storage elements (such as dielectric cavities) to form resonant cavities. However, these energy storage elements only have a few high-Q resonance points in the low frequency band. ...

Claims

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Application Information

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IPC IPC(8): H01S5/125
Inventor 熊锦添蒲涛方涛王荣
Owner ARMY ENG UNIV OF PLA
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