Laser wavelength adjustment-based opto-electronic oscillator with tunable frequency and broadband

A technology of laser wavelength and photoelectric adjustment, which is applied in the direction of solid-state lasers, etc., can solve the problems of frequency adjustment range limitation, etc., and achieve the effect of compact structure, wide adjustable frequency range, and fast frequency adjustment speed

Inactive Publication Date: 2012-03-07
ZHEJIANG UNIV
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Problems solved by technology

Frequency tunability is an important characteristic of microwave signal sources, but because it is difficult to produce high-Q broa

Method used

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  • Laser wavelength adjustment-based opto-electronic oscillator with tunable frequency and broadband
  • Laser wavelength adjustment-based opto-electronic oscillator with tunable frequency and broadband
  • Laser wavelength adjustment-based opto-electronic oscillator with tunable frequency and broadband

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Embodiment Construction

[0011] The present invention will be further described below in conjunction with accompanying drawing:

[0012] Such as figure 1 As shown, the wavelength tunable laser 1, the polarization controller 2, the dual-arm Mach-Zehnder modulator 3, the narrowband phase-shifting fiber Bragg grating 4, and the high-speed photodetector 5 in the frequency broadband tunable optoelectronic oscillator based on laser wavelength adjustment pass through The optical fibers are connected in sequence; high-speed photodetector 5, microwave high-pass filter 6, microwave amplifier 7, microwave phase shifter 8, microwave coupler 9, microwave 3dB quadrature coupler 10, radio frequency of dual-arm Mach-Zehnder modulator 3 The input port is connected in sequence through the microwave coaxial line, double-arm Mach-Zehnder modulator 3, narrow-band phase-shifting fiber grating 4, high-speed photodetector 5, microwave high-pass filter 6, microwave amplifier 7, microwave phase shifter 8, microwave The couple...

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Abstract

The invention discloses a laser wavelength adjustment-based opto-electronic oscillator with a tunable frequency and a tunable broadband. The opto-electronic oscillator is characterized in that: a wavelength tunable laser, a polarization controller, a double-arm Mach-Zehnder modulator, a narrowband phase-shifted fiber grating and a high speed photoelectric detector are connected in order by fibers; and radio frequency input ports of the high speed photoelectric detector, a microwave high pass filter, a microwave amplifier, a microwave phase shifter, a microwave coupler, a microwave 3dB quadrature coupler and the double-arm Mach-Zehnder modulator are connected in order by microwave coaxial lines. Besides, a closed opto-electronic oscillation loop is formed by the double-arm Mach-Zehnder modulator, the narrowband phase-shifted fiber grating, the high speed photoelectric detector, the microwave high pass filter, the microwave amplifier, the microwave phase shifter, the microwave coupler, and the microwave 3dB quadrature coupler; and a high quality microwave signal with a tunable frequency and a tunable broadband is generated at another output port of the microwave coupler by adjustinga wavelength of the wavelength tunable laser. According to the invention, the opto-electronic oscillator has advantages of compact structure, fast frequency adjusting speed, and wide tunable frequency domain and the like.

Description

technical field [0001] The invention relates to a high-quality microwave signal generating device with adjustable frequency broadband, in particular to a frequency broadband adjustable photoelectric oscillator based on laser wavelength adjustment. Background technique [0002] 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, and high-frequency microwave signals need to be generated by frequency doubling, but frequency doubling will bring about a significant decline in signal phase noise performance. In 1996, X.Steve Yao and Lute Maleki proposed the optoelectronic oscillator for the first time. The optoelectronic oscillator uses a high-Q photoelectric resonant cavity to store microwave energy, which can gen...

Claims

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Application Information

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IPC IPC(8): H01S1/02
Inventor 杨波金晓峰章献民池灏郑史烈
Owner ZHEJIANG UNIV
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