Traveling wave photoelectric detector integrated with polarization coupling processing

A photodetector and photodetection technology, which is applied in the field of photodetectors, can solve problems such as the complexity of photoelectric links, increased hardware costs, and difficulties in daily use and maintenance, so as to avoid the reduction of responsivity, improve the signal-to-noise ratio, and simplify Effect of Device Configuration

Inactive Publication Date: 2017-03-29
SUN YAT SEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the use of polarization controllers or polarization-maintaining optical fibers complicates the optical link, increases hardware costs, and makes daily use and maintenance difficult

Method used

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  • Traveling wave photoelectric detector integrated with polarization coupling processing
  • Traveling wave photoelectric detector integrated with polarization coupling processing
  • Traveling wave photoelectric detector integrated with polarization coupling processing

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] figure 1 It is a schematic structural diagram of the photodetector provided in this embodiment. The photodetector of this embodiment includes a constituent unit, and each constituent unit includes a radio frequency transmission line 1, a photodetection unit 2 loaded on both sides of the transmission line, two A passive optical waveguide 3 connected to each other at one end, a passive two-dimensional grating 4 set at the junction of the two passive optical waveguides, wherein the radio frequency transmission line is connected to the output end of the optical detection unit 2; the passive optical waveguide is used for optical The detection unit provides an optical signal.

[0024] Among them, the metal radio frequency transmission line 1 is the ground electrode G, signal electrode S, and ground electrode G from left to right. The ground electrode G, signal electrode S, and ground electrode G constitute the electrode frame (GSG) of the traveling wave photodetector. The rad...

Embodiment 2

[0032] like figure 2 As shown, the photoelectric sensor provided in this embodiment includes two constituent units. The radio frequency transmission line 1 is, from left to right, the ground electrode G, the signal electrode S1, the ground electrode G, the signal electrode S2, the ground electrode G, and the ground electrode G. , signal electrode S1, ground electrode G, signal electrode S2, and ground electrode G form an electrode frame (GSGSG) of two traveling wave photodetectors in parallel; output connection. This embodiment increases the number of constituent units to two, enabling the photodetector to simultaneously separate two groups of optical signals whose polarization states are perpendicular to each other, and convert them into corresponding radio frequency signals for output, realizing integrated polarization demultiplexing photoelectric conversion.

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Abstract

The invention relates to a traveling wave photoelectric detector integrated with polarization coupling processing. The traveling wave photoelectric detector at least comprises one component unit. Each component unit comprises a radio-frequency transmission line, optical detection units arranged at the two sides of the radio-frequency transmission line respectively, two passive optical waveguides, a pair of ends of which are mutually connected, and a passive two-dimensional grating arranged at the joint of the two passive optical waveguides, wherein the radio-frequency transmission line is connected with the output ends of the optical detection units; and the two passive optical waveguides are used for providing optical signals for the optical detection units arranged at the two sides of the radio-frequency transmission line.

Description

technical field [0001] The invention relates to the field of photodetectors, in particular to a traveling wave photodetector integrated with coupled polarization processing. Background technique [0002] In the photoelectric communication link, the photoelectric conversion of the optical signal through the photodetector realizes the demodulation of the radio frequency electrical signal. Due to the dual constraints of carrier transition response and circuit relaxation response in traditional surface-incidence photodetectors, the bandwidth parameters and responsivity parameters of photodetectors cannot be optimized at the same time, and the bandwidth efficiency product index of the detector is limited. In order to solve the shortage of bandwidth efficiency product faced by traditional surface incident photodetectors, the design scheme of traveling wave structured light detectors can be adopted, without sacrificing the carrier response bandwidth of the device, from the perspect...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L27/144
CPCH01L27/144
Inventor 陈钰杰许鹏飞余思远
Owner SUN YAT SEN UNIV
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