Abstract

Heterodyne autocorrelation measurement of 1.55 \mum optical pulses from an actively mode-locked external cavity diode laser is performed before and after transmission through an optical fiber. In heterodyne autocorrelation, optical spectrum is resolved electronically. This method is suitable for measurement of optical pulses with a spectral width of less than 100 GHz, and it gives not only the pulse width and chirp of the pulses, but also it is useful for determining the dispersion and optical Kerr constant of an optical fiber. Analytical formalism for deducing these quantities is given for Gaussian pulses. Principal measurement is performed using a mode-locked diode laser. Dispersion is measured for a conventional-dispersion fiber of 35 km. Also, self-phase modulation (SPM) is measured for a dispersion-shifted fiber of 15.83 km.

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Appl. Opt. (1)

J. Lightwave Technol. (1)

S. G. Evangelides Jr., L. F. Mollenauer, J. P.Gordon, and N. S. Bergano, "Polarization multiplexing with solitons," J. Lightwave Technol., vol. 10, pp. 28-35, Jan. 1992.

Opt. Lett. (9)

J. Paye, M. Ramaswamy, J. G. Fujimoto, and E. P. Ippen, "Measurement of the amplitude and phase of ultrashort light pulses from spectrally resolved autocorrelation," Opt. Lett., vol. 18, pp. 1946-1948, Nov. 1993.

J. L. A. Chilla and O. E. Martinez, "Direct determination of the amplitude and the phase of femtosecond light pulses," Opt. Lett., vol. 16, pp. 39-41, Jan. 1991.

R. L. Fork, C. H. Brito Cruz, P. C. Becker, and C. V. Shank, "Compression of optical pulses to six femtoseconds by using cubic phase compensation," Opt. Lett., vol. 12, pp. 483-485, July 1987.

J. E. Rothenberg and D. Grischkowsky, "Measurement of optical phase with subpicosecond resolution by time-domain interferometry," Opt. Lett., vol. 12, pp. 99-101, Feb. 1987.

D. J. Kane and R. Trebino, "Single-shot measurement of the intensity and phase of an arbitrary ultrashort pulse by using frequency-resolved optical gating," Opt. Lett., vol. 18, pp. 823-825, May 1993.

V. Wong and I. A. Walmsley, "Analysis of ultrashort pulse-shape measurement using linear interferometers," Opt. Lett., vol. 19, pp. 287-289, Feb. 1994.

K. S. Kim, R. H. Stolen, W. A. Reed, and W. Quoi, "Measurement of the nonlinear index of silica-core and dispersion-shifted fibers," Opt. Lett., vol. 19, pp. 257-259, Feb. 1994.

A. Boskovic, S. V. Chernikov, J. R. Taylor, L. Gruner-Nielsen, and O. A. Levring, "Direct continuous-wave measurement of n_2 in various types of telecommunication fiber at 1.55 \mum," Opt. Lett., vol. 21, pp. 1966-1968, Dec. 1996.

T. Kato, Y. Suetsugu, M. Takagi, E. Sasaoka, and N. Nishimura, "Measurement of the nonlinear refractive index in optical fiber by the cross-phase-modulation method with depolarized pump light," Opt. Lett., vol. 20, pp. 988-990, May 1995.

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