Nonlinear fiber amplifiers used for a 1430-1530nm low-loss windo

Details Nonlinear fiber amplifiers used for a 1430-1530nm low-loss windo Nonlinear fiber amplifiers used for a 1430-1530nm low-loss windo

1998-03-24

2000-08-08

Moskowitz, Nelson

Optical: systems and elements

Optical amplifier

Raman or brillouin process

359327, 359337, 359345, G02B 626, G02B 642, H01S 330

Patent

active

061010243

ABSTRACT:
An apparatus and method are described for exploiting almost the full almost 25 THz of bandwidth available in the low-loss window in optical fibers (from 1430 nm to 1620 nm) using a parallel combination of optical amplifiers. The low-loss window at about 1530 nm-1620 nm can be amplified using erbium-doped fiber amplifiers (EDFAs). However, due to the inherent absorption of the erbium at shorter wavelengths, EDFAs cannot be used below about 1525 nm without a significant degradation in performance. For the low-loss window at approximately 1430-1530 nm, amplifiers based on nonlinear polarization in optical fibers can be used effectively. A broadband nonlinear polarization amplifier (NLPA) is disclosed which combines cascaded Raman amplification with parametric amplification or four-wave mixing. In particular, one of the intermediate cascade Raman order wavelengths .lambda..sub.r should lie in close proximity to the zero-dispersion wavelength .lambda..sub.0 of the amplifying fiber. For this intermediate Raman order, spectral broadening will occur due to phase-match with four-wave mixing (if .lambda..sub.r <.lambda..sub.0) or phase-matched parametric amplification (if .lambda..sub.r >.lambda..sub.0). In further cascaded Raman orders, the gain spectrum will continue to broaden due to the convolution of the gain spectrum with the spectrum from the previous Raman order.

REFERENCES:
patent: 5689596 (1997-11-01), Evans
Stolen et al., "Parametric Amplification and Frequency Conversion in Optical Fibers," IEEE Journal of Quantum Electronics, Jul. 1982, vol. QE-18, No. 7, pp. 1062-1072.
Agrawal, G.P., "Stimulated Raman Scattering," Chapter 8 and "Parametric Processes", Chapter 10 of Nonlinear Fiber Optics, 1989.
Yamada et al., "Broadband and gain-flattened amplifier composed of a 1.55.mu.m-band and a 1.58.mu.m-band Er.sup.3+- doped fibre amplifier in a parallel configuration," Electronics Letters, Apr. 10, 1997, vol. 33, No. 8, pp. 710-711.
Masuda et al., Wideband, gain-flattened, erbium-doped fibre amplifiers with 3dB bandwidths of >50nm.
Wysocki et al., "Broad-Band Erbium-Doped Fiber Amplifier Flattened Beyond 40 nm Using Long-Period Grating Filter," IEEE Photonics Technology Letters, Oct. 1997, vol. 9, No. 10, pp. 1343-1345.
Sun et al., "80nm ultra-wideband erbium-doped silica fibre amplifier," Nov. 6, 1997, vol. 33, No. 23, pp. 1965-1967.
Chee et al, IEEE Journal of Quantum Electronics, vol. 26, #3, pp 541-549, Mar. 1990.
Grabavsky et al, Optical Engineering, vol. 34, #4, pp 1016-1018, Apr. 1995.

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