The Temporal Gearbox
  We are inspired by mechanical gearboxes and demonstrate its analog counterpart in optics. We use nonlinear dispersion modes as "gears" to overcome the mismatch between the ultrahigh speed of optical data and the much slower sampling rate of electronic digitizers and processors. We delineate the mathematical foundations and show its utility in ultrafast optical measurements and digital image compression. 
Bahram Jalali, Jacky C.K. Chan, Ata Mahjoubfar, Daniel R. Solli,   Mohammad H. Asghari
physics.optics physics.ins-det