| 1. |
- Chavez Boggio, José Manuel, et al.
(författare)
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Double-pumped FOPA with 40 dB flat gain over 81 nm bandwidth
- 2008
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Ingår i: ECOC 2008, 21-25 September 2008, Brussels, Belgium. ; , s. Tu.3.B.5-
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Konferensbidrag (refereegranskat)abstract
- We report the construction and characterization of a record performance continuous-wave double-pumpedfiber-optical parametric amplifier exhibiting 40 dB flat gain over 81nm bandwidth.
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| 2. |
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| 3. |
- Myslivets, E., et al.
(författare)
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Spatial Equalization of Zero-Dispersion Wavelength Profiles in Nonlinear Fibers
- 2009
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Ingår i: IEEE Photonics Technology Letters. - 1041-1135 .- 1941-0174. ; 21:24, s. 1807-1809
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Tidskriftsartikel (refereegranskat)abstract
- Longitudinal zero-dispersion wavelength (ZDW) fluctuations in long waveguides impose a fundamental limit on the achievable parametric mixer bandwidth. We demonstrate for the first time that the precisely measured ZDW profile can be taken advantage of by applying spatially controlled tension along the fiber length for fluctuation reduction and synthesis of a wide mixer response. The technique was experimentally validated by measuring local dispersion and tension maps and synthesizing a 145-nm-wide fiber parametric amplifier.
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| 4. |
- Rahman, Syed, 1981, et al.
(författare)
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Hydrodynamic Simulations of Unitraveling-Carrier Photodiodes
- 2007
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Ingår i: IEEE Journal of Quantum Electronics. - 0018-9197 .- 1558-1713. ; 43:11, s. 1088-1094
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Tidskriftsartikel (refereegranskat)abstract
- We present simulated results of a unitraveling-carrier photodiode (UTC-PD) using the hydrodynamic carrier transportation model. A maximum responsivity of 0.25 A/W and a small-signal 3-dB bandwidth of 52 GHz were obtained for a 220-nm-thick InGaAs absorption layer. The physical properties of the UTC-PD have been investigated at different optical injection levels. Modulation of the energy-band profile due to the space charge effect has been observed at high injection level, and an electron velocity overshoot of 3e7 cm/s has been found to effectively delay the onset of space charge effects. Comparisons with reported simulated results using the drift–diffusion model as well as reported experimental results are presented. The results suggest the necessity of using the hydrodynamic transport equations to accurately model the UTC-PD. In addition, it has been corroborated that the photoresponse of the UTC-PD could be improved by incorporating a graded doping profile in the absorption layer.
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| 5. |
- Tong, Zhi, 1977, et al.
(författare)
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Measurement of Sub-1 dB Noise Figure in a Non-degenerate Cascaded Phase Sensitive Fibre Parametric Amplifier
- 2009
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Ingår i: 35th European Conference on Optical Communication, ECOC 2009; Vienna; Austria; 20 September 2009 through 24 September 2009. - 9781424450961 ; , s. Art. no. 5287291-
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Konferensbidrag (refereegranskat)abstract
- Noise figure (NF) spectrum as well as its signal-power-dependence in a non-degenerate cascaded phase-sensitive fibre parametric amplifier was characterized. A 0.8dB NF (2dB below the conventional quantum limit) was achieved at 11dB gain.
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| 6. |
- Alic, N., et al.
(författare)
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Benefits of Joint Statistics in MLSD-Equalized Transmission
- 2009
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Ingår i: IEEE Photonics Technology Letters. - 1041-1135 .- 1941-0174. ; 21:8, s. 495-497
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Tidskriftsartikel (refereegranskat)abstract
- We experimentally investigate and quantify performance improvement, accounting for multiple bit intervals' joint statistics in filtered equalized on-off keying OC-192 fiber-optic links relying on Viterbi-algorithm-based sequence detection. We demonstrate that the penalty associated with narrow filtering can be alleviated for the most part with an appropriate detection approach.
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| 7. |
- Andrekson, Peter, 1960
(författare)
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All-optical waveform sampling
- 2009
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Ingår i: Optics InfoBase Conference Papers. - 2162-2701. - 9781424440801
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Konferensbidrag (refereegranskat)
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| 8. |
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| 9. |
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| 10. |
- Andrekson, Peter, 1960
(författare)
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Hber-optic parametric amplifiers and their applications
- 2008
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Ingår i: 2008 34th European Conference on Optical Communication, ECOC 2008; Brussels; Belgium; 21 September 2008 through 25 September 2008.
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Konferensbidrag (refereegranskat)abstract
- A review of recent developments on fiber-optic parametric amplifiers will be given. Distinct features will be discussed and compared with other kinds of amplifiers. Different applications, including all-optical sampling, will be explored in some detail.
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