Paratactic type photoelectric detector

Abstract

The invention discloses a paratactic type photoelectric detector. The paratactic type photoelectric detector comprises an area p composed of semiconductor materials, an intrinsic area i with light dope and an area n. The area p, the area i and the area n are respectively divided into two independent parts through insulation layers, an area P I, an area i I, an area n I, an electrode I and an electrode II form a photoelectric detection element I, and an area p II, an area i II, an area n II, an electrode III and an electrode IV form the other photoelectric detection element II. The photoelectric detection element I and the photoelectric detection element II are circular, the photoelectric detection element I is arranged outside the photoelectric detection element II, and the area p I and the area p II are further respectively coated with an anti-reflecting layer I and an anti-reflecting layer II. The paratactic type photoelectric detector can simultaneously detect the fiber cores in optical fibers of double cladding or multiple cladding and optical signals transmitted in the cladding, and is simple in structure, convenient to use, low in producing cost and convenient to popularize and apply.

Description

technical field [0001] The invention relates to a photodetector, in particular to a side-by-side photodetector. Background technique [0002] There are many types of existing photodetectors, and the most commonly used ones are PIN type and APD type. The diameter of the photosensitive surface of the common photodetectors is 4 microns to 500 microns, but the photosensitive surfaces of these photodetectors are all integrated. , that is, it is only suitable for detecting one optical signal; on the other hand, when the existing double-clad or multi-clad optical fibers need to monitor the optical signals of the core and the cladding separately, the existing photodetectors are helpless Yes, it is necessary to separate the optical signal through a special coupler to monitor, which leads to an increase in cost. Chinese Patent Application No. 200710015228.8 discloses a sensing device using a double-clad fiber, which mentions the need to detect the intensity of the optical signal of t...

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Problems solved by technology

[0002] There are many types of existing photodetectors, and the most commonly used ones are PIN type and APD type. The diameter of the photosensitive surface of the common photodetectors is 4 microns to 500 microns, but the photosensitive surfaces of these photodetectors are all integrated. , that is, it is only suitable for detecting one optical signal; on the other hand, when the existing double-clad or multi-clad optical fibers need to monitor the optical signals of the core and the cladding separately, the existing photodetectors are helpless Yes, it is necessary to separate the optical signal through a special coupler to monitor, which leads to an increase in cost

Chinese Patent Application No. 200710015228.8 discloses a sensing device using a double-clad fiber, which mentions the need to detect the intensity of the optical signal of the inner cladding, but has to use a double-clad fiber coupler to connect the inner cladding of the double-clad fiber The optical signal is extracted, resulting in an increase in cost

With the application of double-clad optical fiber and multi-clad optical fiber in the fields of communication and sensing, a photodetector that can simultaneously monitor the optical signal transmitted in the core and cladding is required, and no such product has been found on the market

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