Equivalent phase shift in a fiber Bragg grating achieved by changing the sampling period

It is proposed and demonstrated experimentally for the first time to achieve the desired phase shifts within one channel of a sampled Bragg grating by changing the sampling period. Only ordinary phase masks and submicrometer precision are needed, leading to improved flexibility, repeatability, and cost-effectiveness in fiber Bragg grating design and fabrication especially when multiple and mutable phase shifts are required. Based on this method, a /spl pi/-shift and two bipolar encoders for direct-sequence optical code-division multiple-access systems are obtained experimentally, which are in good agreement with simulation.

[1]  D N Payne,et al.  Er(3+):Yb(3+)-codoped fiber distributed-feedback laser. , 1994, Optics letters.

[2]  S. Xie,et al.  Sampled Bragg grating with desired response in one channel by use of a reconstruction algorithm and equivalent chirp. , 2004, Optics letters.

[3]  Chongcheng Fan,et al.  Correction to Analytical expression of sampled Bragg gratings with chirp in the sampling period and , 2000 .

[4]  K. Matsushima,et al.  Demonstration of the improvement of apodized 127-chip SSFBG in coherent time-spreading OCDMA network , 2004, Optical Fiber Communication Conference, 2004. OFC 2004.

[5]  Shizhong Xie,et al.  Tunable dispersion compensation in a 10-Gb/s optical transmission system by employing a novel tunable dispersion compensator , 2004 .

[6]  A novel method to achieve various equivalent chirp profiles in sampled Bragg gratings using uniform-period phase masks , 2002 .

[7]  Periklis Petropoulos,et al.  A comparative study of the performance of seven- and 63-chip optical code-division multiple-access encoders and decoders based on superstructured fiber Bragg gratings , 2001 .

[8]  John Canning,et al.  pi -phase-shifted periodic distributed structures in optical fibres by UV post-processing , 1994 .

[9]  P. Petropoulos,et al.  Phase encoding and decoding of short pulses at 10 Gb/s using superstructured fiber Bragg gratings , 2001, IEEE Photonics Technology Letters.

[10]  S Barcelos,et al.  Complex grating structures with uniform phase masks based on the moving fiber-scanning beam technique. , 1995, Optics letters.

[11]  Raman Kashyap,et al.  UV written reflection grating structures in photosensitive optical fibres using phase-shifted phase masks , 1994 .

[12]  Deepak Uttamchandani,et al.  Phase shifted Bragg gratings formed in optical fibres by post-fabrication thermal processing , 1996 .