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Compact regulatable type multi-mode interference coupler

A multi-mode interference and adjustable technology, which is applied in the field of integrated optics, can solve the problems of unfavorable large-scale integration of photon/optoelectronic devices, less compact device structure, and low yield rate of devices, and achieve compact structure, short device length, and high device structure. compact effect

Inactive Publication Date: 2007-01-31
SOUTHEAST UNIV
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Problems solved by technology

At present, multimode interference couplers mainly use rectangular multimode waveguides, that is, the width of the multimode waveguide remains unchanged in the direction of light propagation. The disadvantage of this structure is that the device structure is still not compact, which is not conducive to photonic / optoelectronic devices. Large-scale integration; fixed optical power ratio, small manufacturing tolerance, low device yield

Method used

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  • Compact regulatable type multi-mode interference coupler
  • Compact regulatable type multi-mode interference coupler
  • Compact regulatable type multi-mode interference coupler

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Embodiment Construction

[0020] figure 1 It is the first example of the present invention, consisting of an input channel 1, a symmetrical tapered multimode waveguide 2, a modulation module 3 and an output channel 4. Input channel 1 is divided into upper and lower. Output channel 4 is also divided into upper and lower two. The modulation modules 3 are respectively arranged at the upper edge and the lower edge of the symmetrical tapered multimode waveguide 2 . The light field is input from the upper or lower input channel, enters the symmetrical tapered multimode waveguide 2, and is output from the upper / lower output channel (3 and 4) by the self-mirroring effect of the multimode waveguide 2. Since the width of the multimode waveguide is not uniform in the direction of light propagation, the effective refractive index of the excited fundamental mode increases, while the effective refractive index of the next higher order mode decreases, so its beat length decreases. According to the self-mirroring p...

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Abstract

The invention discloses a compact adjustable multi-mode interfering coupler that includes input channel connecting to optical signal input end, multi-mode wave guide, modulating module, and output channel connecting to the output end of optical signal. The feature is that: the multi-mode wave guide is not rectangle, and input channel and output channel connecting to the two sides of the multi-mode wave guide along optical signal transferring direction, and the modulation module is set on the surface of multi-mode wave guide. The invention decreases the bat length of multi-mode wave guide and makes component compact. It could be used in the wave guide type coupler of optical communication system, optical computer system and photon / photoelectron integrated loop.

Description

1. Technical field [0001] The invention belongs to the field of integrated optics and relates to a waveguide coupler used in optical communication systems, optical computer systems and photon / optoelectronic integrated circuits, in particular to a compact and adjustable multi-mode interference coupler. 2. Background technology [0002] Waveguide coupler is the basic component of optical communication system, optical computer system and photon / optoelectronic integrated circuit. It is an important auxiliary component of photonic / optoelectronic devices such as optical switches and optical modulators. Waveguide couplers mainly include directional coupler type, Y branch type, X branch type and multimode interference type. The directional coupler type coupler requires high processing precision for the coupling waveguide, and the Y / X branch requires a small branch angle, which is difficult for photolithography. Multimode interference couplers have the advantages of compact structu...

Claims

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Application Information

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IPC IPC(8): G02B6/26G02B6/35G02F1/01
Inventor 肖金标孙小菡刘旭蔡纯
Owner SOUTHEAST UNIV
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