Fiber gratings for dispersion compensation in a 10-Gbit/s IM-DD semiconductor laser system

Chromatic dispersion is one of the most important transmission limitations in systems operating at 1550 nm, and much effort has been invested in obtaining dispersion compensation schemes for standard fibers already installed. Various different fiber Bragg grating dispersion compensation schemes are studied or a system composed of a directly modulated 1550 nm single-mode semiconductor laser signal propagating through a standard nonlinear fiber link. The laser diode is simulated by its stochastic rate equations, while the apodized chirped fiber Bragg gratings are obtained by numerical resolution of their coupled-mode equations. The optimal grating length for dispersion compensation after transmission through 100 km standard single-mode fiber is obtained by means of minimizing the eye opening penalty of the signal. Pre and post-compensation cases are analyzed separately, and differences between both cases are discussed in detail. Different optimal grating lengths arise for each case, and better results are obtained in general with post-compensation. Pulses with a FWHM of the order of 65 ps with various laser chirp parameters are reconstructed using a 5.75 cm chirped grating with a 16th- order Gaussian apodization function.

[1]  A Yariv,et al.  Compensation for channel dispersion by nonlinear optical phase conjugation. , 1979, Optics letters.

[2]  A. Naka,et al.  Transmission distance of in-line amplifier systems with group-velocity-dispersion compensation , 1995 .

[3]  Lin Zhang,et al.  Uv-written in-fibre Bragg gratings , 1996 .

[4]  Govind P. Agrawal,et al.  Nonlinear Fiber Optics , 1989 .

[5]  Tomoyoshi Kataoka,et al.  Chirped in-fibre Bragg grating dispersion compensators: linearisation of dispersion characteristic and demonstration of dispersion compensation in 100 km, 10 Gbit/s optical fibre link , 1994 .

[6]  C. Mirasso,et al.  Fiber based dispersion compensation schemes in nonlinear fibers for laser diode pulses in high bit-rate IM/DD systems☆ , 1997 .

[7]  S. Turitsyn,et al.  Chirped solitons with strong confinement in transmission links with in-line fiber Bragg gratings. , 1998, Optics letters.

[8]  A. Naka,et al.  Fibre transmission distance determined by eye opening degradation due to selfphase modulation and group-velocity dispersion , 1992 .

[9]  Comparison of Dispersion Compensation Schemes Including Fiber Nonlinearities , 1995 .

[10]  C. Mirasso,et al.  Analytical study of nonlinear chirped pulses: propagation in dispersive optical fibers , 1996 .

[11]  John E. Sipe,et al.  Modulational instability and tunable multiple soliton generation in apodized fiber gratings , 1998 .

[12]  S. Balle,et al.  Statistical properties of the spectrum of light pulses in fast pseudorandom word modulation of a single-mode semiconductor laser , 1995 .

[13]  S. Chi,et al.  Improving soliton transmission in a dispersion compensated system by pre-chirping and pre-shaping method , 1998 .

[14]  Ian Bennion,et al.  Fibre dispersion compensation using a chirped in-fibre Bragg grating , 1994 .

[15]  K. Hill,et al.  Narrow-band Bragg reflectors in optical fibers. , 1978, Optics letters.

[16]  M. S. Miguel,et al.  Parametric dependence of stochastic frequency variations in the gain switching of a single-mode laser diode , 1993 .

[17]  K Takiguchi,et al.  Chirped in-fiber Bragg gratings for compensation of optical-fiber dispersion. , 1994, Optics letters.

[18]  Natalia M. Litchinitser,et al.  Analysis of fiber Bragg gratings for dispersion compensation in reflective and transmissive geometries , 1997 .

[19]  S. Thibault,et al.  Numerical analysis of the optimal length and profile of a linearly chirped fiber Bragg grating for dispersion compensation. , 1995, Optics letters.

[20]  J. Soto-Crespo,et al.  Dispersion compensation in a 10 Gbit/s IM/DD semiconductor laser system in an NRZ scheme , 1998 .