System of implementing optical Hilbert transformation

Abstract

The invention relates to a system of implementing optical Hilbert transformation. The system of implementing optical Hilbert transformation includes a fiber circulator, a collimator, a beam expander, a raster, a knife edge corner angle reflector, a first convex lens, a first reflector, a second convex lens and a second reflector, wherein a first port, a second port and a third port are arranged on the fiber circulator; the incident light is input from the first port and is output from the second port, and then is incident on the raster through the collimator and the beam expander successively; the raster spreads the light beam dispersion with different wavelength in the incident light; the light beams with different wavelength are divided into two paths after being reflected by the knife edge corner angle reflector; one path of light beams penetrate through the first convex lens, then are reflected by the first reflector, and then return according to the original path; and the returned light beams are input from the second port and are output from the third port. Compared with the prior art, the system of implementing optical Hilbert transformation can realize optical Hilbert transformation by adjusting d1 and d2, and is great in the response bandwidth.

Description

technical field [0001] The invention belongs to the technical field of optical signal processing and relates to a system for realizing optical Hilbert transform. Background technique [0002] Due to the limitations of bandwidth and transmission speed, the processing speed of electrical signals is slow, and it is difficult to meet the stringent requirements of high-speed and low-power consumption in future large-capacity communication networks, while light has the advantages of fast propagation speed, wide transmission frequency bandwidth, and large communication capacity. , so optical signal processing technology has received more and more attention in recent years. Among them, the Hilbert transform is also called quadrature filtering or broadband π phase shifting. It is to convolve a signal with the Hilbert operator in order to realize instantaneous signal extraction and complete instantaneous calculation of short or complex signals. . Therefore, the optical Hilbert trans...

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Problems solved by technology

[0003] Some scholars have realized Hilbert conversion by using fiber Bragg gratings (references [1], [2]), but this kind of system is too complex, the performance is unstable, and the response bandwidth of the device is narrow, all less than 5nm, which cannot be targeted at Wide-spectrum signals are processed, so the range of applications is limited

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