• Title/Summary/Keyword: side-polished

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Passively Mode-Locked 1.93-㎛ All-Fiberized Femtosecond MOPA Laser Using a Gold-Deposited Side-Polished Fiber (금 증착 측면연마 광섬유를 이용한 1.93㎛ 모드잠금 펨토초 전광섬유 MOPA 레이저)

  • Jung, Minwan;Koo, Joonhoi;Lee, Ju Han
    • Korean Journal of Optics and Photonics
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    • v.25 no.6
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    • pp.340-345
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    • 2014

  • We experimentally demonstrate the use of a gold-deposited side-polished fiber as a $2-{\mu}m$-band polarizing device to produce mode-locked pulses from a thulium/holmium-codoped fiber ring cavity. The mode-locking effect was induced by nonlinear transmission caused by the gold-deposited side-polished fiber, due to nonlinear polarization rotation of the oscillated beam within the fiberized cavity. It is also shown that ~558-fs pulses with a peak power of ~6.7 kW could readily be produced at a wavelength of 1935 nm through subsequent thulium/holmium-codoped fiber amplification, due to the higher-order soliton compression effect.

  • https://doi.org/10.3807/KJOP.2014.25.6.340 인용 PDF KSCI

Polarization-independent temperature sensor using cladding layers of the overlay waveguide coupled with a side-polished fiber (측면 연마 광섬유와 결합된 상부 도파로의 클래딩을 이용한 편광 무의존 온도센서)

  • 손경락;김광택;송재원
    • Korean Journal of Optics and Photonics
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    • v.13 no.6
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    • pp.467-472
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    • 2002

  • In this paper, we propose a polarization-insensitive temperature sensor using a thermo-optic effect of the upper and (or) lower cladding of a planar waveguide in contact with a side-polished fiber. A microscope cover glass with thickness of a 170 ${\mu}{\textrm}{m}$ is adopted as an overlay waveguide because this waveguide opposes sudden temperature change and ensures polarization-insensitive responses. The measured polarization-dependence loss is less than 0.3 dB. The temperature can be detected as a result of the shift in coupling wavelength of the sensor. We investigate the shift in coupling wavelength as a function of the temperature variation with respect to the different thermo-optic coefficients of lower and upper claddings. We also show that the temperature sensitivity of the device can be easily controlled by the thermo-optic coefficients of lower and upper claddings of the overlay waveguide.

  • https://doi.org/10.3807/KJOP.2002.13.6.467 인용 PDF KSCI

The Analysis of tight Coupling and Propagation for a Composite Fiber-Dielectric Slab with a Conductor Cladding

  • Kwon, Kwang-Hee;Song, Jae-Won;Kim, Jeong-Hoon;Park, Euy-Don;Son, Seok-Woo
    • Journal of the Optical Society of Korea
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    • v.7 no.1
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    • pp.20-27
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    • 2003

  • A theoretical presentation of evanescent coupling is offered with respect to the refractive indexes between a side-polished optical fiber and an infinitely planar waveguide with a conductor cladding (PWGCC). The PWG is suspended at a constant distance from an unclad fiber core and attached with the perfect conductor (PEC) on one side. The behavior of the distributed couple. is examined using a coupled mode model, which takes account of the two dimensions of the waveguide configuration. The coupling and propagation of light were found to depend on both the relationship between the refractive index values of each structure and the configuration of the side-polished fiber used in the PWGCC. The spreading of light in the unconfined direction of the PWGCC is described in terms of a simple geometrical interpretation of the synchronization condition that is in agreement with a previous investigation of the problem based on the coupled-mode theory (CMT). The power of the light propagation in the fiber decreased exponentially along the fiber axis as it was transferred to the PWGCC, where it was carried away.

  • https://doi.org/10.3807/JOSK.2003.7.1.020 인용 PDF KSCI