Optical frequency comb generation device based on power operation circuit and cascaded MZM (Mach-Zehnder Modulator)

An optical frequency comb and computing circuit technology, applied in the field of photonics, can solve the problems of poor power flatness, low bandwidth, and the number of frequency components of the optical frequency comb cannot be tuned, and achieve tunable frequency components and frequency intervals, and high bandwidth , the effect of good spectral characteristics

Pending Publication Date: 2021-07-23
NANJING UNIV OF POSTS & TELECOMM
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  • Abstract
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  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In the existing schemes of generating optical frequency combs based on electro-optic modulators, the number of frequency components of the generated optical frequency combs cannot be tuned, the bandwidth is low, and the power flatness is poor.

Method used

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  • Optical frequency comb generation device based on power operation circuit and cascaded MZM (Mach-Zehnder Modulator)
  • Optical frequency comb generation device based on power operation circuit and cascaded MZM (Mach-Zehnder Modulator)
  • Optical frequency comb generation device based on power operation circuit and cascaded MZM (Mach-Zehnder Modulator)

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Embodiment 1

[0037] According to the principle of MZM, from the spectrum function of the target OFC, it can be concluded that the driving signal required to drive the cascaded MZM to produce 19 comb-line flat OFC is a radio frequency signal with a single cycle waveform similar to Gaussian pulse; according to the Fourier series relationship, the radio frequency The power signal can be equivalently expressed as two power ratios of 4:1 and frequencies of 2 f c and 4 f c The superposition of the sinusoidal radio frequency signal is also equivalent to a frequency of f c The 4th power of a sinusoidal RF signal, such as figure 2 shown. figure 2 It can be regarded as the equivalent circuit of the radio frequency signal passing through the power operation circuit, but this equivalent circuit requires two radio frequency sources, which is a costly option. The OFC generated by MZM is equivalent to 2 sets of frequency intervals of 2 f c and 4 f c The OFC spectra are superimposed, making th...

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Abstract

The invention discloses an optical frequency comb generation device based on a power operation circuit and a cascaded MZM. The optical frequency comb generation device comprises a continuous light source, two cascaded Mach-Zehnder modulators, a radio frequency signal source and the power operation circuit. A radio frequency signal source outputs a radio frequency signal, the radio frequency signal generates a radio frequency power signal through a power operation circuit, and the radio frequency power signal sequentially drives a first Mach-Zehnder modulator and a second Mach-Zehnder modulator which are cascaded after passing through an electric power divider. The cascaded Mach-Zehnder modulator modulates continuous light output by the continuous light source to generate an optical frequency comb. The optical frequency comb generated by the invention has the advantages of tunable frequency component number and frequency interval, high bandwidth, high power flatness and the like.

Description

technical field [0001] The invention belongs to the technical field of photonics, in particular to an optical frequency comb generating device based on a power operation circuit and a cascaded MZM. Background technique [0002] In recent years, the generation of optical frequency combs has attracted great interest in many areas of photonics technology. Optical frequency combs play a broad and important role in fields including optical communications, microwave photonics, spectroscopy, and metrology. [0003] Traditional optical frequency comb generation methods include microring resonators, mode-locked lasers, and nonlinear optical fibers. In recent years, with the development of electro-optic modulators (EOMs), the research of using electro-optic modulators to generate optical frequency combs has gradually attracted widespread attention. [0004] In the study of using electro-optic modulators to generate optical frequency combs, the main methods are as follows: use the ph...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02F1/21G02F1/01
CPCG02F1/21G02F1/0121
Inventor 李培丽史睿范一鸣
Owner NANJING UNIV OF POSTS & TELECOMM
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