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张爱玲, Ailing Zhang, H.Y. Tam, C. Lu, M.S. Demokan and P.K.A. Wai
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-1年11月30日
We demonstrate a 10GHz optical clock recovery scheme based on optical parametric oscillator using highly nonlinear photonic crystal fiber as the dynamic gain medium.
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张爱玲, Ailing Zhang, Heliang Liu, M. S. Demokan, and H. Y. Tam
IEEE PHOTONICS TECHNOLOGY LETTERS, VOL.17, NO.12, DECEMBER 2005,-0001,():
-1年11月30日
A stable and broad bandwidth multiwavelength fiberring laser suitable for use in dense wavelength-division-multiplexing systems is demonstrated. A highly nonlinear photonic crystal fiber is inserted in the ring cavity to stabilize the power fluctuation and broaden the output spectrum. A thin-film Fabry-Pérot etalon filter is used to get stable wavelength lasing. A Sagnac filter is employed to achieve uniform power distribution at each wavelength at the laser output. A laser with a power fluctuation about 0.1dB in each wavelength within 20min and with wavelength shift of less than 0.016 nm within 10min is achieved. A stable 24-wavelength lasing operation with wavelength spacing of 0.8 nm within the 3-dB spectral range of 1573-1594 nm and signal-to-noise ratio better than 48dB is observed experimentally.
Dense, wavelength-division, multiplexing (, DWDM), , erbium-doped fiber, Fabry-Perot (, EP), elalon fillter four-wave mixing (, FWM), , multiwavelength fiber lasers, nonlinear optics, photonic crystal fiber (, PCF),
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张爱玲, Ailing Zhang*, M.S. Demokan, H.Y. Tam
Optics Communications 260 (2006) 670-674,-0001,():
-1年11月30日
A multiwavelength laser source is demonstrated with a high power erbium-doped fiber amplifier as the gain medium. A highly nonlinear photonic crystal fiber (PCF) is inserted in the ring cavity to provide nonlinear gain by four-wave mixing. A Sagnac loop is incorporated in the ring cavity serving as a comb-like multichannel filter. The comparison between fiber ring laser without PCF and with PCF shows that the highly nonlinear PCF can generate a larger number of excited wavelengths and help stabilize the output power.
Nonlinear optics, Fiber ring laser, Four-wave mixing, Photonic crystal fiber
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张爱玲, Ailing Zhang, Heliang Liu, M. S. Demokan, and H. Y. Tam
IEEE PHOTONICS TECHNOLOGY LETTERS, VOL.17, NO.12, DECEMBER 2005,-0001,():
-1年11月30日
We demonstrate both width and wavelength-tunable optical pulse train generation based on four-wave mixing in highly nonlinear photonic crystal fiber. By tuning the delay time between two pulse trains, the pulsewidth of the generated pulse train is continuously tuned. By tuning the wavelength of one of the pulse trains, the wavelength of the generated pulse train is also continuously tuned. In our experiment, the pulsewidth of a 5-GHz repetition rate pulse train is tuned from 88 to 19ps and the pulsewidth of a 10-GHz pulse train is tuned from 39 to 19ps. The 3-dB wavelength tuning range is about 70 nm
Four-wave mixing (, FWM), , nonlinear optics, optical fiber communication
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张爱玲, Ailing Zhang a) and Kam Tai Chan
Appl. Phys. Lett., Vol.83, No.13, 29 September 2003,-0001,():
-1年11月30日
An optical switch structure based on total internal reflection effects in intersecting silicon oxynitride waveguides has been designed and successfully fabricated. The optical reflection losses of the waveguides have been analyzed and compared with experimental results. It was shown that, apart from materials and scattering losses, the major factors contributing to the reflection losses are waveguide width, reflection facet displacement, and reflection facet tilt angle, with the last factor being the most critical in deciding the overall loss of the device.
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