Characterization of tunable photonic crystal fiber directional couplers

Jang, Hyun Soo; Park, Kwang No; Lee, Kyung Shik

doi:10.1364/ao.46.003688

Cited by 9 publications

(3 citation statements)

References 13 publications

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“…It showed the excess loss of 3~6 dB. In 2007, as small as 2 dB of excess loss was obtained by H. S. Jang et al with the PCF coupler [19]. However, this side-polishing technique is much more complex than the FBT method to fabricate the PCF coupler, because the air holes of the PCF could be very easily contaminated by the polishing powder during the polishing process.…”

Section: Photonic Crystal Fiber Couplermentioning

confidence: 99%

Specialty Fiber Coupler: Fabrications and Applications

Lee¹,

Eom²,

Park³

et al. 2010

Journal of the Optical Society of Korea

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We review the research on specialty fiber couplers with emphasis placed on the characteristics that make them attractive for biomedical imaging, optical communications, and sensing applications. The fabrication of fiber couplers has been carried out with, in addition to conventional single mode fiber, various specialty fibers such as photonic crystal fiber, double clad fiber, and hole-assisted fiber with a Ge-doped core. For the fiber coupler fabrication, the side polishing and the fused biconical tapered methods have been developed. These specialty fiber couplers have been applied to optical coherence tomography, fluorescence spectroscopy, fiber sensors, and optical communication systems. This review aims to provide a detailed statement on the recent progress and novel applications of specialty fiber couplers.

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Section: Photonic Crystal Fiber Couplermentioning

confidence: 99%

Specialty Fiber Coupler: Fabrications and Applications

Lee¹,

Eom²,

Park³

et al. 2010

Journal of the Optical Society of Korea

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“…In accordance with developed theory of the ORR [27], the objective of this study is to present an analysis of tuneability of optical filter using an optical ring resonator when excited by a sinewave-modulated laser diode. Baed on previous ORR structures [23,24], where singlemode fiber (SMF) used as the resonator loop, in this paper, we assume to use a PCF resonance loop built on a PCF coupler [28,29]. The peculiar properties of PCFs have interesting effects on transmission function of the ORR.…”

Section: Introductionmentioning

confidence: 99%

Characteristics of tuneable optical filters using optical ring resonator with PCF resonance loop

Shalmashi

Seraji

Mersagh

2012

Eur. Phys. J. Appl. Phys.

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A theoretical analysis of a tuneable optical filter is presented by proposing an optical ring resonator (ORR) using photonic crystal fiber (PCF) as the resonance loop. The influences of the characteristic parameters of the PCF on the filter response have been analyzed under steady-state condition of the ORR. It is shown that the tuneability of the filter is mainly achieved by changing the modulation frequency of the light signal applied to the resonator. The analyses have shown that the sharpness and the depth of the filter response are controlled by parameters such as amplitude modulation index of applied field, the coupling coefficient of the ORR, and hole-spacing and air-filling ratio of the PCF, respectively. When transmission coefficient of the loop approaches the coupling coefficient, the filter response enhances sharply with PCF parameters. The depth and the full-width half-maximum (FWHM) of the response strongly depends on the number of field circulations in the resonator loop. With the proposed tuneability scheme for optical filter, we achieved an FWHM of 1.55 nm. The obtained results may be utilized in designing optical add/drop filters used in WDM communication systems.

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“…[2][3][4][5][6][7][8][9][10][11][12][13][14][15][16] In recent years, D-shaped PCFs have attracted great research interest because they allow broadband operation in their specific applications. [17][18][19][20][21] Typically, the D-shaped optical fiber has been fabricated by burying a fiber in a grooved quartz block and then grinding the cladding to a thickness of a few microns, causing a range of materials overlaid on the polished cladding window to interact with an evanescent field of light propagating through the core. When a PCF with C 6v symmetry is processed, its crystallographic axes must be considered because the symmetry is broken once the PCF is ground.…”

Section: Introductionmentioning

confidence: 99%

Determination of Crystallographic Axes of Photonic Crystal Fiber by Transversal Scanning Method

Lim¹,

Lee²,

Lee³

et al. 2010

Jpn. J. Appl. Phys.

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We present a method for determining crystallographic symmetry axes in an air-hole structure of a photonic crystal fiber (PCF) with a hexagonal structure. This method is based on the measurement of intensity distribution of the light transversely scattered from the PCF. The symmetry axes can be determined from the distinctive intensity pattern that is repeated for an axial rotation of the PCF. Simulations and experimental studies reveal that the technique is reliable and quite sensitive to the angle between the crystallographic symmetry axis and the launched light.

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Characterization of tunable photonic crystal fiber directional couplers

Cited by 9 publications

References 13 publications

Specialty Fiber Coupler: Fabrications and Applications

Specialty Fiber Coupler: Fabrications and Applications

Characteristics of tuneable optical filters using optical ring resonator with PCF resonance loop

Determination of Crystallographic Axes of Photonic Crystal Fiber by Transversal Scanning Method

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