Large-port-number wavelength selection switch based on optical beam expanding unit and control method thereof

A wavelength selective switch and port number technology, which is applied in the field of optical communication and optical signal processing, and can solve problems such as limiting the maximum allowable width of input/output fiber port arrays, limiting the number of fiber ports, insertion loss uniformity, and port crosstalk not being achieved. , to achieve the effect of expanding the allowable width, eliminating the restrictive effect, and having a simple structure

Pending Publication Date: 2017-05-31
MINZU UNIVERSITY OF CHINA
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At the OFC'2015 international conference, Furukawa Electric Co., Ltd. reported a 1×40-port silicon-based Research results of liquid crystal WSS processor ("LCOS-based Flexible Grid 1x40Wavelength Selective Switch Using PlanarLightwave Circuit as Spot Size Converter", paper Tu3A.8, OFC'2015); NTT (NTTCorporation) uses complex PLC waveguide grating input/output ports The array implements a 1×95 port liquid crystal on silicon WSS processor ("Ultra-High Port Count Wavelength Selective Switch Employing Waveguide-Based I/O Frontend", paper Tu3A.7, OFC'2015), but due to the use of more complex PLC design, technica

Method used

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  • Large-port-number wavelength selection switch based on optical beam expanding unit and control method thereof
  • Large-port-number wavelength selection switch based on optical beam expanding unit and control method thereof
  • Large-port-number wavelength selection switch based on optical beam expanding unit and control method thereof

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Experimental program
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Effect test

Embodiment 1

[0034] Such as figure 2 and 4 As shown, in this embodiment, the port optical beam expander unit 4 adopts a pair of shaping prisms, and the incident light is respectively incident on the hypotenuses of the two shaping prisms at the Brewster angle. The shaping prisms are centered, and the hypotenuses of the first and second shaping prisms are placed perpendicular to each other. Such as Figure 4 As shown in (b), the port optical beam expander unit composed of a group of shaping prism pairs makes the spacing of the parallel beams arranged along the y-axis and corresponding to different output fiber ports returned after the direction assignment of the liquid crystal spatial light modulator be effective. The expansion allows the width of the one-dimensional single-mode fiber array to be greatly increased, so that more fiber output ports can be arranged in the one-dimensional fiber port array. In the case that the optical pointing range of the liquid crystal spatial light modula...

Embodiment 2

[0036] Such as image 3 and 5 As shown, in this embodiment, the port optical beam expander unit adopts a combination of a telescopic system-type concave lens and a convex lens, and the optical axes of the concave lens and the convex lens coincide with the optical axis of the incident light. Such as Figure 5 As shown in (b), using a telescopic system optical beam expander unit made of a concave lens and a convex lens, the returned parallel beams arranged along the y-axis first pass through the concave lens and then pass through the convex lens, and the distance between the output beams can also be made The spacing is significantly enlarged, so that the number of output optical ports of the wavelength selective switch can be greatly increased under the condition that the optical pointing range of the liquid crystal spatial light modulator is very limited.

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Abstract

The invention discloses a large-port-number wavelength selection switch based on an optical beam expanding unit and a control method thereof. The large-port-number wavelength selection switch comprises a one-dimensional single mode fiber array, a microlens array, a polarization adjusting prism, the port optical beam expanding unit, a double-glued optical Fourier transformation lens, a transmissive phase diffraction grating, a cylindrical mirror, a liquid crystal spatial light modulator and a liquid crystal graph loading control system. By adding the port optical beam expanding unit into an optical system, maximum allowable width of the one-dimensional single mode fiber array is effectively expanded, so that limitation effect of optical pointing ability of the liquid crystal spatial light modulator on number of fiber ports which can be contained by the wavelength selection switch is eliminated thoroughly, number of output fiber ports in the wavelength selection switch is substantially increased, and fold increase of the number of ports of the wavelength selection switch is realized. The large-port-number wavelength selection switch is simple in structure, easy to manufacture, low in cost and capable of realizing substantial increase of the number of the output ports.

Description

technical field [0001] The invention relates to the fields of optical communication and optical signal processing, in particular to a wavelength selective switch with a high number of ports based on an optical beam expander unit and a control method thereof. Background technique [0002] Since the beginning of the 21st century, with the continuous and huge growth of optical network traffic at a rate of 100 times in 10 years, the existing electrical layer switching technology has many advantages in terms of the number and volume of equipment, information exchange capacity, construction and operation costs, and energy consumption. The "ceiling effect" has become increasingly prominent. Building a next-generation low-energy and high-spectrum-efficiency intelligent all-optical communication network based on all-optical switching, multi-dimensional multiplexing, high-spectrum utilization super-channel transmission and switching technology, and software dynamic adjustment of netwo...

Claims

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Application Information

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IPC IPC(8): G02B6/35
CPCG02B6/3526G02B6/3528G02B6/3534G02B6/354
Inventor 陈根祥高云舒陈笑宋菲君王义全张策官家祥张颖
Owner MINZU UNIVERSITY OF CHINA
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