[OPTICAL REVIEW Vol. 9, No. 3 (2002) 100-105]
Two-Dimensional Optical Data Transmission with Space-Time Conversion Combined with Code Division Multiple Access
Hiroshi TANABE and Fumihiko KANNARI
Department of Electronics and Electrical Engineering Faculty of Science and Technology Keio University 3-14-1, Hiyoshi, Kohoku-ku, Yokohama 223-8522, Japan
(Received September 7, 2001; Accepted February 12, 2002)
A new scheme for two-dimensional parallel data transmission with a femtosecond laser pulse through a single-mode fiber, which is based upon one-dimensional space-time conversion technique in conjunction with code division multiple access (CDMA), is implemented and numerically demonstrated. Since many one-dimensional spatial data, which are encoded with their own M-sequence code, must be embedded in a single pulse, the bit-error rate performance degrades compared with conventional CDMA driven by many unsynchronized pulses. Still, two-dimensional digital images in a 16 bits × 16 bits plane (256-bits parallel data) are successfully transmitted by a single femtosecond laser pulse at an equivalent transmission rate of 1.6 Tbit/s and recovered by spectral holography.
Key words: optical CDMA, femtosecond laser, pulse shaping, spectral holography, image transmission