Optimal design of coupling waveguide structure for adiabatic optical directional full couplers weighted by sin-square and raised-cosine functions

Chi Feng Chen; Yun Sheng Ku; Tsu Te Kung

doi:10.1016/j.optcom.2007.08.005

Optimal design of coupling waveguide structure for adiabatic optical directional full couplers weighted by sin-square and raised-cosine functions

Chi Feng Chen, Yun Sheng Ku, Tsu Te Kung

Department of Mechanical Engineering

Research output: Contribution to journal › Article › peer-review

8 Scopus citations

Abstract

The optimal design of coupling waveguide structure for adiabatic optical directional full couplers (AODFC) based on weighted sin-square function (SSF) and raised-cosine function (RCF) are investigated in this paper. The coupling lengths with a crosstalk smaller than -30 dB at the operating wavelength of 1.57 μm resulted in a value of 3.0 and 2.4 mm for the SSF and RCF cases, respectively. Under the same level of crosstalk, the wavelength ranges obtained by weighted SSF and RCF could be varied about 1.33-1.70 μm and 1.27-1.70 μm with coupler lengths of 6.0 and 5.5 mm, respectively. Clearly, the AODFC weighted by RCF has the superior performances of both short coupling length and broad wavelength ranges.

Original language	English
Pages (from-to)	79-86
Number of pages	8
Journal	Optics Communications
Volume	280
Issue number	1
DOIs	https://doi.org/10.1016/j.optcom.2007.08.005
State	Published - 1 Dec 2007

Keywords

Adiabatic directional coupler
Adiabatic optical directional full coupler
Coupling waveguide structure
Optical directional coupler
Raised-cosine function
Sin-square function

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10.1016/j.optcom.2007.08.005

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title = "Optimal design of coupling waveguide structure for adiabatic optical directional full couplers weighted by sin-square and raised-cosine functions",

abstract = "The optimal design of coupling waveguide structure for adiabatic optical directional full couplers (AODFC) based on weighted sin-square function (SSF) and raised-cosine function (RCF) are investigated in this paper. The coupling lengths with a crosstalk smaller than -30 dB at the operating wavelength of 1.57 μm resulted in a value of 3.0 and 2.4 mm for the SSF and RCF cases, respectively. Under the same level of crosstalk, the wavelength ranges obtained by weighted SSF and RCF could be varied about 1.33-1.70 μm and 1.27-1.70 μm with coupler lengths of 6.0 and 5.5 mm, respectively. Clearly, the AODFC weighted by RCF has the superior performances of both short coupling length and broad wavelength ranges.",

keywords = "Adiabatic directional coupler, Adiabatic optical directional full coupler, Coupling waveguide structure, Optical directional coupler, Raised-cosine function, Sin-square function",

author = "Chen, {Chi Feng} and Ku, {Yun Sheng} and Kung, {Tsu Te}",

note = "Funding Information: This work is partially supported by National Science Council, Republic of China, under Contract NSC-95-2221-E-008-047.",

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T1 - Optimal design of coupling waveguide structure for adiabatic optical directional full couplers weighted by sin-square and raised-cosine functions

AU - Chen, Chi Feng

AU - Ku, Yun Sheng

AU - Kung, Tsu Te

N1 - Funding Information: This work is partially supported by National Science Council, Republic of China, under Contract NSC-95-2221-E-008-047.

PY - 2007/12/1

Y1 - 2007/12/1

N2 - The optimal design of coupling waveguide structure for adiabatic optical directional full couplers (AODFC) based on weighted sin-square function (SSF) and raised-cosine function (RCF) are investigated in this paper. The coupling lengths with a crosstalk smaller than -30 dB at the operating wavelength of 1.57 μm resulted in a value of 3.0 and 2.4 mm for the SSF and RCF cases, respectively. Under the same level of crosstalk, the wavelength ranges obtained by weighted SSF and RCF could be varied about 1.33-1.70 μm and 1.27-1.70 μm with coupler lengths of 6.0 and 5.5 mm, respectively. Clearly, the AODFC weighted by RCF has the superior performances of both short coupling length and broad wavelength ranges.

AB - The optimal design of coupling waveguide structure for adiabatic optical directional full couplers (AODFC) based on weighted sin-square function (SSF) and raised-cosine function (RCF) are investigated in this paper. The coupling lengths with a crosstalk smaller than -30 dB at the operating wavelength of 1.57 μm resulted in a value of 3.0 and 2.4 mm for the SSF and RCF cases, respectively. Under the same level of crosstalk, the wavelength ranges obtained by weighted SSF and RCF could be varied about 1.33-1.70 μm and 1.27-1.70 μm with coupler lengths of 6.0 and 5.5 mm, respectively. Clearly, the AODFC weighted by RCF has the superior performances of both short coupling length and broad wavelength ranges.

KW - Adiabatic directional coupler

KW - Adiabatic optical directional full coupler

KW - Coupling waveguide structure

KW - Optical directional coupler

KW - Raised-cosine function

KW - Sin-square function

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DO - 10.1016/j.optcom.2007.08.005

M3 - 期刊論文

AN - SCOPUS:35148875661

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SP - 79

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JO - Optics Communications

JF - Optics Communications

SN - 0030-4018

IS - 1

ER -

Optimal design of coupling waveguide structure for adiabatic optical directional full couplers weighted by sin-square and raised-cosine functions

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Keywords

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