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Optical element, light emitting device and light receiving device

A technology of optical components and emitting devices, applied in the direction of optical components, optics, light guides, etc., can solve difficult problems such as flatness

Inactive Publication Date: 2018-11-23
FUJITSU LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, even with a ring waveguide, it is difficult to achieve sufficient flatness without temperature control in conventional delay interferometric elements

Method used

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  • Optical element, light emitting device and light receiving device
  • Optical element, light emitting device and light receiving device
  • Optical element, light emitting device and light receiving device

Examples

Experimental program
Comparison scheme
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no. 1 example

[0035] First, a first embodiment will be described. The first embodiment is an example of a wavelength demultiplexer. figure 2 is a diagram illustrating the structure of the optical element according to the first embodiment.

[0036] Such as figure 2 As illustrated in , the optical element 100 according to the first embodiment includes a delay interferometer 110 . Delay interferometer 110 includes optical coupler 114 and optical coupler 115 , and waveguide 111 and waveguide 112 connected between optical coupler 114 and optical coupler 115 . The waveguide 112 is longer than the waveguide 111 . The delay interferometer 110 is also configured with a ring waveguide 113 coupled to the waveguide 111 . The waveguide 111 includes a phase shifter 116 .

[0037]Delay interferometer 120 and delay interferometer 130 are connected to optical coupler 115 . Delay interferometer 120 includes optical coupler 124, optical coupler 125, and optical coupler 126, waveguide 121 and waveguide...

no. 2 example

[0053] Next, a second embodiment will be described. The second embodiment is an example of a wavelength demultiplexer. Figure 5 is a diagram illustrating the structure of an optical element according to the second embodiment.

[0054] While the phase shifter 116 is included in the waveguide 111 in the first embodiment as described above, in the second embodiment, the phase shifter 116 is not provided and the phase shifter 216 is included in the waveguide 112 . The length of phase shifter 216 is -0.26 microns. Other structures are similar to those of the first embodiment.

[0055] In the second embodiment, because the phase shifter 216 is provided, the length of the waveguide 112 is 0.26 microns shorter than that of the first embodiment, and because the phase shifter 116 is not provided, the length of the waveguide 111 is shorter than that of the first embodiment. The waveguides of the examples are 0.26 microns shorter in length. Therefore, similar to the first embodiment,...

no. 3 example

[0057] Next, a third embodiment will be described. The third embodiment is an example of a wavelength demultiplexer. Image 6 is a diagram illustrating the structure of an optical element according to a third embodiment.

[0058] Although the phase shifter 116 is included in the waveguide 111 in the first embodiment as described above, in the third embodiment, the phase shifter 116 is not provided, the phase shifter 316 is included in the waveguide 111, and in the waveguide 112 A phase shifter 317 is included. The length of phase shifter 316 is 0.13 microns, and the length of phase shifter 317 is -0.13 microns. Other structures are similar to those of the first embodiment.

[0059] In the third embodiment, since the phase shifter 317 is provided, the length of the waveguide 112 is 0.13 μm shorter than that of the first embodiment, and the waveguide 111 of the phase shifter 316 is provided instead of the phase shifter 116 The length of is 0.13 μm shorter than that of the wa...

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Abstract

An optical element, a light emitting device and a light receiving device are disclosed. The optical element includes: a first delay interferometer; and a second delay interferometer and a third delay interferometer cascaded with the first delay interferometer. The first delay interferometer includes: a first optical coupler and a second optical coupler; a first waveguide between the first optical coupler and the second optical coupler; a second waveguide therebetween, the second waveguide being longer than the first waveguide; and a ring waveguide coupled to the first waveguide. The difference in the length of the first waveguide and the length of the second waveguide differs from the difference in length corresponding to the channel spacing by a length corresponding to the phase shift caused by the loading of the annular waveguide. At least one of the first waveguide and the second waveguide includes a phase shifter that counteracts the phase shift caused by the loading of the annular waveguide.

Description

technical field [0001] Embodiments discussed herein relate to optical elements, light emitting devices, and light receiving devices. Background technique [0002] Optical components, such as wavelength multiplexing / demultiplexing components, are used for optical communication and optical interconnection. Recently, silicon (Si) photonics has attracted attention as a promising technology for high-capacity interconnection, and it is expected to increase transmission capacity. For example, a silicon photonic wire waveguide type wavelength multiplexer / demultiplexer is used as a multiplexer to multiplex WDM optical signals, and a demultiplexer to demultiplex WDM optical signals for transmission in a silicon chip / Receive WDM optical signal. As an example of such a multiplexer / demultiplexer, there is a delay interference element, and various studies on the delay interference element have been conducted. [0003] For example, it is reported that the flatness of the multiplexed / ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B6/293G02B6/28
CPCG02B6/2861G02B6/2938G02B2006/121G02B6/29355
Inventor 郑锡焕
Owner FUJITSU LTD