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We report fabrication of the first low-loss, broadband 37-cell photonic bandgap fiber.Exploiting absence of surface modes and low cross-talk in the fiber we demonstrate mode division multiplexing over...
From scanning-electron microscope images of the cross section of a photonic-bandgap fiber (NKT Photonics’HC-1550-02) we developed a realistic model for its permittivity profile that includ...
A novel polarizer is designed by liquidfi lling in partial air-holes of a hollow-core photonic bandgap fi ber(PBGF) forming an asymmetric waveguide structur e, which leads to the vertical polarization...
We report on oscillators and amplifiers based on all-silica singlemode, large mode area photonic bandgap fibers elaborated by the modified chemical vapour deposition process.
An all-solid LMA Bragg fibre (mode area exceeding 1100μm 2 ) is presented for mid-infrared applications, based on a new design strategy that induces large differential loss between fundamental and hig...
To understand the loss limitations of a splice between a hollow-core fiber and a conventional fiber, we use a numerical model to calculate the expected coupling loss between the NKT Photonics’ HC-1550...
Solid photonic bandgap fibers offer distributed spectral filtering with extraordinarily high suppression. This opens new possibilities of artificially tailoring the gain spectrum of fibers. We present...
We describe the fabrication and characteristic of an all-solid photonic bandgap fiber with loss as low as 0.41dB/km at 1550nm within the first-order bandgap. The control of bandgaps,dispersion and ben...
An electrically tunable bandpass filter based on two photonic crystal fibers filled with different liquid crystals is demonstrated. Both the short-wavelength and long-wavelength edge are tuned individ...
The mode coupling properties of highly-birefringent tuneable LPGs formed in HC-PBGF are presented. The mode coupling from the fundamental core mode to higher-order guided mode of a HC-PBGF is obtained...
Using a new full-vectorial finite-difference mode solver utilizing a hexagonal Yee’s cell, we calculated the dispersion diagram of a slightly multimode (16 modes) air-core photonic-bandgap ʂ...
Square lattice with much higher node-to-strut ratio is promising for significantly extending bandgaps in hollow-core fibres. First such fibres are achieved here. Minimum loss of 67dB/km is demonstrate...
Linearly-polarized lasing at 1180 nm is demonstrated by utilizing polarization maintaining Yb-doped solid photonic bandgap fiber. The extinction ratio of the output light between two lineary-polarized...
An electrically controlled liquid crystal photonic-bandgap fiber polarizer is experimentally demonstrated.A maximum 21.3dB electrically tunable polarization extinction ratio is achieved with 45° rotat...

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