Width-adjustable full-light optical switch of switch window

A window width and all-optical technology, applied in the field of optoelectronics, can solve the problems of long optical fiber, strong input control optical power, and limited flexibility of optical switches, and achieve the effect of adjustable window width and convenient and flexible operation

Inactive Publication Date: 2012-11-07
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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Problems solved by technology

The balanced interference structure and fast response time of the NOLM itself enable it to achieve stable and fast switching operations, but the optical switch of the NOLM structure requires a long optical fiber and a strong input control optical power, and the width of the optical switch is not adjustable , the optical switch has little flexibility

Method used

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  • Width-adjustable full-light optical switch of switch window

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Embodiment

[0020] combine figure 1 , connecting each device, semiconductor optical amplifier and fiber delay line can be placed anywhere in the nonlinear loop mirror. The signal pulse adopts continuous light with a wavelength of 1552nm. After passing through a circulator and a polarization beam splitter (coupling ratio is 0.5), it is divided into two beams of light whose polarization directions are perpendicular to each other. Propagate in the loop mirror; when no clock signal is added, the clockwise and counterclockwise signal light components pass through the semiconductor optical amplifier to obtain the same gain and phase variables, and after they return to port 5, they are detected by the polarizer and the polarization controller. There is no phase difference, differential phase modulation cannot occur, so interference cannot occur, and the switch is in the "off" state; the trigger pulse light is input at the other input port of the polarization beam splitter, the wavelength is 1542...

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Abstract

The invention relates to the field of photoelectric technology and discloses a width-adjustable full-light optical switch of a switch window. The full-light optical switch uses cross gain modulation XPM effect of a semiconductor optical amplifier (SOA) for changing the offset of the SOA in a nonlinear optical loop mirror (NOLM) by controlling the delay time of an optical delay line (ODL) in the NOLM, so that the problems that the width of the optical switch is unadjustable, the flexibility of the optical switch is small and the like, the width of the optical switch is adjustable, and the operation is convenient and flexible.

Description

technical field [0001] The invention relates to the field of optoelectronic technology, in particular to an all-optical optical switch with adjustable switching window width. Background technique [0002] The amplification principle of the semiconductor optical amplifier SOA is similar to the working principle of the semiconductor laser. It also uses the phenomenon of particle population inversion caused by the excited transition between energy levels to perform optical amplification. The usual semiconductor optical amplifier SOA is coated with anti-reflection film on its two sections to eliminate the reflection at both ends to obtain broadband, high output, and low noise. The semiconductor optical amplifier SOA is used as an optical band conversion switch element. Its main advantage lies in the extremely fast optical switching rate, the switching time is ns level, and it can also perform gain compensation for inherent optical signal loss. In addition, the semiconductor opt...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02F1/35
Inventor 刘永王蕾努尔买买提刘运龙张尚剑陆荣国
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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