• Title/Summary/Keyword: 가변파장

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Implementation of tunable laser source for WDM-PON using an self seeded F-P LD (Self Seeded F-P LD를 이용한 WDM-PON에서의 파장 가변 레이저 소스 구현)

  • Oh, Yeong-guk;Hwang, Ji-hong;Lee, Hyuek-jae;Lee, Chang-hee
    • Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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    • 2012.10a
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    • pp.439-441
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    • 2012

  • A new wavelength tunable laser source based on a self-seeded F-P LD for a WDM-PON system has been proposed in this paper. The proposed laser source has a merit of the wavelength tunable range of approximately 20 nm with very simple setup. The measured minimum relative intensity noise(RIN) was approximately -124 dB/Hz and the possibility of 10 Gb/s external modulation was showed.

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A Study on Ti:LiNbO3 Integrated Optical Wavelength Tunable Polarization Mode Controllers (Ti:LiNbO3 집적광학형 파장가변 편광모드 조절기에 관한 연구)

  • Moon, Je-Young;Jung, Hong-Sik
    • Korean Journal of Optics and Photonics
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    • v.16 no.4
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    • pp.376-383
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    • 2005

  • We designed and fabricated integrated-optic tunable polarization controllers based on $LiNbO_3$ with the Ti-indiffused waveguide along the y-axis utilizing the electro-optic effect. The device consists of $TE↔TM$ mode converters and TE/TM phase shifters. We analyzed the operation principles of each device utilizing transfer matrices based on a Jones matrix and simulated shifting of the center wavelength by inducing voltage. We confirmed experimentally that the fabricated devices control the tunability of the center wavelength and the input SOP.

  • https://doi.org/10.3807/KJOP.2005.16.4.376 인용 PDF KSCI

Tunable dispersion compensator based on chirped fiber bragg gratings with a mechanical rotator (회전기와 첩 광섬유 격자를 이용한 가변 분산 보상기)

  • 김준희;배준기;한영근;김상혁;이상배;정제명
    • Korean Journal of Optics and Photonics
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    • v.15 no.2
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    • pp.100-103
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    • 2004

  • A systematic method for tunable dispersion compensation based on chirped fiber Bragg gratings without a center wavelength shift is proposed. The specially designed mechanical rotator can flexibly control the chirping ratio along the fiber grating and the corresponding dispersion value. The group delay can be linearly controllable since the proposed method can induce a linear strain gradient with the rotation angle change. The dispersion value could be controlled from 228.04 ㎰/nm to 1430.7 ㎰/nm with small center wavelength shift, which was less than 0.03 nm.

  • https://doi.org/10.3807/KJOP.2004.15.2.100 인용 PDF KSCI

Geometrical Analysis and Implementation of the Real-Time Tuning Structure Using Spatial Light Modulator in Photorefractive Tunable Filter (광굴절 가변 필터에서 공간광학변조기를 이용한 실시간 튜닝 구조의 기하학적 해석 및 구현)

  • An, Jun-Won;Kim, Seong-Goo;Kim, Nam
    • Journal of the Korean Institute of Telematics and Electronics D
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    • v.36D no.12
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    • pp.43-52
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    • 1999

  • We propose a new method for tuning of center wavelength in photorefractive filter using $LiNbO_3$ crystal doped with 0.015Wt.% Fe. through the filter bandwidth property analysis using the geometrical method, a new wavelength selectivity theory was presented. In this scheme, the tuning of the center wavelength can be achieved by the real time incident angle control of the received heam, which was gotten by the spatial light modulator. So, tuning time depend on the response time of the SLM and results in the high speed turing. Because the use of thermally fixed grating in our filter, it has uniform diffraction property to the all filtering wavelength. Designed tunable filter has 4nm bandwidth and composed of the three channel with 10nm space. From the optical experiment, we get the 4.5nm, 4.25nm, 4nm bandwidth and 1530.5nm, 1540.5nm, 1549.5nm center wavelength respectively.

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