A Dispersion Compensation Method Based on Time Reversal
A technology of time reversal and dispersion compensation, which is applied in the field of optical communication, can solve problems such as limited dispersion compensation capability, application constraints, and limited flexibility, and achieve strong practicability
Inactive Publication Date: 2015-10-14
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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[0003] The document 'Optical-pulse equalization of low-dispersion transmission in single-mode fibers in the 1.3--1.7μm spectral region' proposes a compensation method using dispersion compensating fiber, by connecting a dispersion-matched fiber behind the long fiber Dispersion compensating fiber, which enables dispersion compensation, but requires precise control of the length of the dispersion compensating fiber, thus limiting its flexibility
[0004] The document 'Dispersion compensation using only fiber bragg gratings' proposes a method of using Brillouin fiber gratings for dispersion compensation, which is compensated by introducing negative dispersion fiber gratings, but this method requires precise control of the center wavelength of the fiber grating, and the dispersion compensation The capacity is limited, so its application is restricted to a certain extent
[0005] The document 'Compensation of fiber chromatic dispersion by spectral inversion' proposes a method of using phase conjugation to realize dispersion compensation, by using phase conjugation in four-wave mixing to achieve dispersion compensation, but due to the , the light needs to propagate in a matching optical fiber for compensation, so the flexibility of the system needs to be improved
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[0028] The present invention will be further described below in conjunction with the accompanying drawings.
[0029] A dispersion compensation method based on time reversal, comprising the following steps:
[0030] Step 1: The pilot light carrying the clock signal is transmitted from the receiver to the transmitter.
[0031] Step 2: In the transmitter part, the signal of the pilot light is loaded onto the idler light after time inversion, and the signal to be transmitted is also modulated on the idler light.
[0032] Step 3: The idler light carrying the time-reversal of the signal is transmitted from the transmitter to the receiver to realize a dispersion-free signal output.
[0033] The specific experimental structure of this embodiment is as follows: image 3 As shown, at the receiver, a continuous optical signal with a center wavelength of 1570nm is loaded onto a Mach-Zenger intensity modulator with a 3dB bandwidth of 10GHz and modulated by a 10GHz clock signal. The bias...
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The invention belongs to the field of optical communication technologies and provides a dispersion compensation method based on time reversal. According to the technical scheme, the dispersion compensation method includes the first step that pilot frequency light carrying time clock signals is transmitted to an emitter through a receiver and is used for carrying out channel estimation on transmission functions of optical fibers; the second step that in the emitter part, the signals of the pilot frequency light are loaded on idler frequency light after time reversal, and the signals to be transmitted are also modulated on the idler frequency light; the third step that the idler frequency light carrying the signals is transmitted to the receiver through the emitter to achieve no output of dispersion signals. According to the dispersion compensation method, operation is easy, automatic dispersion compensation can be carried out without the need to calculate the dispersion measures of the optical fibers, and the method has important application value.
Description
technical field [0001] The invention belongs to the technical field of optical communication, relates to optical dispersion compensation technology and optical signal processing technology, and provides a dispersion compensation method based on time inversion. Background technique [0002] Optical communication technology is developing towards high-speed and high-capacity, and optical fiber dispersion is the main factor limiting long-distance optical fiber transmission. How to perform effective dispersion compensation has become a research hotspot in the field of optical communication technology. [0003] The document 'Optical-pulse equalization of low-dispersion transmission in single-mode fibers in the 1.3--1.7μm spectral region' proposes a compensation method using dispersion compensating fiber, by connecting a dispersion-matched fiber behind the long fiber Dispersion compensating fiber to achieve dispersion compensation, but the length of the dispersion compensating fib...
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IPC IPC(8): H04B10/2513
Inventor 欧海燕王秉中
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA