Frequency stabilization of FDM optical signals to a comb of equally-spaced frequencies has been demonstrated for optical signals originating from different locations.
We report a heterodyne beat with a line width of 5.6 ± 0.6 Hz between two cavity-stabilized quantum cascade lasers operating at 8.5 micron.
The authors consider, experimentally and theoretically, the quantum frequency translation (i.e., noiseless conversion) of quantum states of light, including single-photon states.
: We study the effect of frequency translation of single-photon states in optical fiber through use of the Bragg scattering four-wave mixing process.
The transmission frequency or range of frequencies most suitable for the system is considered.
We drive a new frequency-domain adaptive algorithm by using a frequency-domain recursive least squares criterion, minimizing an error signal in the frequency-domain.
The frequency-domain DPSK (differential-phase-shift-keying) method for ultrafast laser pulses has been demonstrated by using an AOM-based pulse shaping technique for modulation and the spectral int
In exploring the possibility of providing digital mobile communications service to a large number of users, we have investigated a spreadspectrum modulation technique using frequency-hopped frequen
Mobile radio telephone systems are required to operate in a hostile environment compared to radio systems using terrestrial and satellite links.
Near future on-board telemetry, tracking and command (TT&C) equipment for secure communications will likely adopt frequency hopping (FH) instead of direct sequence (DS) spread spectrum (SS) tec
