Grating filtering optical device based on planar optical waveguide
A planar optical waveguide and optical waveguide technology, which is applied in the field of optical communication, can solve the problems of large packaging volume, complex fiber grating process, and the inability to integrate multiple devices in a single chip, and achieve the effect of miniaturization
Pending Publication Date: 2021-01-15
SHANGHAI HONGHUI OPTICS COMM TECH
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[0003] The purpose of the present invention is to provide a grating filter optical device based on a planar optical waveguide, which can irradiate ultraviolet light on the planar optical waveguide to realize the same function of the grating, and solve the problems of complex fiber grating technology, large packaging volume, and inability to integrate multiple devices in a single chip. question
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[0021] The present invention will be further described below in conjunction with accompanying drawing.
[0022] see figure 1 , the grating filter optical device based on planar optical waveguide of the present invention includes a planar optical waveguide chip 1 , and at least one optical waveguide 2 is built in the planar optical waveguide chip 1 . Each optical waveguide 2 is provided with a waveguide area 3 for forming a periodic change in refractive index by ultraviolet light irradiation; the planar optical waveguide chip 1 is provided with a window area for exposing the waveguide area 3 . It is convenient to adopt ultraviolet light (UV) to irradiate the window area to form a grating whose refractive index changes periodically.
[0023] The optical waveguide 2 includes a silicon dioxide core layer 21 doped with germanium, and a silicon dioxide cladding layer 22 for wrapping the silicon dioxide core layer 21 . Similar to the core refractive index distribution of convention...
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Abstract
The invention discloses a grating filtering optical device based on a planar optical waveguide, and the device comprises a planar optical waveguide chip which is internally provided with at least oneoptical waveguide; each optical waveguide is provided with a waveguide region which is irradiated by ultraviolet light to form periodic change of refractive index; the planar optical waveguide chip isprovided with a windowing area used for exposing the waveguide region. Ultraviolet light can be irradiated on the planar optical waveguide to achieve the same function of the grating, and the problems that an existing fiber grating is complex in process and large in packaging size, and multiple devices cannot be integrated in a single-chip mode are solved.
Description
technical field [0001] The invention relates to the technical field of optical communication, in particular to a grating filter optical device based on a planar optical waveguide. Background technique [0002] Fiber grating technology has been widely used in the fields of optical communication and fiber optic sensing. Superior wavelength selectivity and filtering characteristics are widely used in the field of optical communication; the advantages of strong anti-interference ability, long transmission distance, small size and light weight make it have great advantages in the field of optical fiber sensing. However, due to the complexity and difficulty of manufacturing fiber gratings, its service life and reliability are greatly reduced compared with ordinary optical fibers. At the same time, the cylindrical structure of optical fibers puts forward higher requirements for packaging and fixing. Contents of the invention [0003] The purpose of the present invention is to pr...
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IPC IPC(8): G02B6/12G02B6/124
CPCG02B6/12009G02B6/124
Inventor 夏翔沈杰李雪峰黄惠良
Owner SHANGHAI HONGHUI OPTICS COMM TECH