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Device for generating Nyquist optical pulse based on ultra-broadband optical frequency comb

A technology of optical frequency comb and optical pulse, which is applied in the direction of optical demodulation, optics, instruments, etc., can solve the problems of complex synchronization system and multi-level generator and amplifier electrical signal processing system power loss, etc., and achieve low phase noise , low cost, small time jitter effect

Active Publication Date: 2015-02-04
INST OF SEMICONDUCTORS - CHINESE ACAD OF SCI
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Problems solved by technology

However, the use of advanced modulation formats inevitably increases the complexity of the system, requiring complex synchronization systems and multi-level generators and amplifiers, as well as complex electrical signal processing systems that cause a large amount of power loss

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  • Device for generating Nyquist optical pulse based on ultra-broadband optical frequency comb
  • Device for generating Nyquist optical pulse based on ultra-broadband optical frequency comb

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Embodiment Construction

[0033] The device for generating Nyquist optical pulses based on an ultra-broadband optical frequency comb provided by the present invention can effectively control the spectral width of the generated optical frequency comb by using an optical bandpass filter. This patent proposes the use of an optoelectronic oscillator system to generate Optical frequency comb with tunable repetition rate. Utilizing the narrow-band characteristics of phase-shifted fiber Bragg gratings, a tunable single-pass microwave photonic filter is realized. Since the bandwidth of phase-shifted fiber Bragg gratings is generally about 20MHz, phase-to-intensity conversion can be effectively realized. Since the microwave signal generated by the photoelectric oscillator has higher spectral purity and relatively better phase noise characteristics, the time stability of the Nyquist pulse generated is better, and the time jitter of the pulse can be effectively improved. By tuning the bandwidth of the optical ban...

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Abstract

The invention discloses a device for generating Nyquist optical pulse based on an ultra-broadband optical frequency comb. The device comprises the following components: a narrow line-width laser, a first wavelength division multiplexer, a polarization controller, a Fabry-Perot electro-optic modulator, a temperature control device, an optical coupler, a circulator, a phase-shifted fiber bragg grating, an optical amplifier, a photoelectric detector, an electric amplifier, an electric phase shifter, a bias T, a direct-current bias, an optical band-pass filter, an optical spectrum analyzer, a quantum dot mode-locked laser, a second wavelength division multiplexer and a plurality of electro-optical modulators. By virtue of the device, the disadvantage of bandwidth of the conventional electronics method can be overcome; the device is used as a light source for optical fiber communication; the frequency spectrum utilization rate of an optical fiber communication system can be greatly improved.

Description

technical field [0001] The invention belongs to the field of optical fiber communication systems, and more specifically relates to a technology for improving the transmission capacity of an optical fiber communication system, and a device for generating Nyquist optical pulses based on an ultra-broadband optical frequency comb. Background technique [0002] With the rapid development and flourishing of cloud computing, interactive video services and personal wireless communications, the data rate transmitted in optical networks is increasing at a rate close to 29% per year. Although the combination of wavelength division multiplexing and time division multiplexing can greatly improve the transmission capacity of optical fiber communication systems, it is still difficult to meet the rapidly increasing transmission capacity. Facing the rapidly increasing transmission capacity, it is necessary to expand the optical transmission system and improve bandwidth utilization. At prese...

Claims

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Application Information

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IPC IPC(8): G02F2/00
CPCG02F2/00G02F2203/07G02F2/008
Inventor 王文亭刘建国李伟祝宁华
Owner INST OF SEMICONDUCTORS - CHINESE ACAD OF SCI
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