One of the problems in optical time division multiplexing (OTDM)1 is the lack of a high speed demultiplexer. We propose an optical demultiplexing technique using optical parametric interactions to increase the bandwidth beyond the limit of techniques such as electrooptics switching. Suppose we receive a N-channel signal at frequency f1 and use a local short pulse laser at f2 with the same repetition rate as one of the channels. Mixing them in a nonlinear optical crystal, we can isolate one of the channels by upconversion to a frequency f3 = f1 + f2.2 We can demultiplex N channels by N such units (Fig. 1). Since optical parametric interactions can have a time response of less than a picosecond, such demultiplexers can be made with a bit rate capacity of the order of tera (1012) bits/s.

© 1990 Optical Society of America

PDF Article


You do not have subscription access to this journal. Citation lists with outbound citation links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
Login to access OSA Member Subscription