Patent ID: 11953776
Assignee: DAVID M. PEPPER
Field: Optics (Instruments)
Classification: CPC G | IPC G

Claim 0:
1. A system for programmably adjusting the phase of the frequency components of an optical signal of a specific linear polarization, comprising:
a circulator to receive and transmit the incident optical signal and to outcouple the reverse propagating optical signal;
a first cylindrical lens to receive said optical signal beyond the circulator and to focus the optical signal into a line focus;
a first dispersive module to receive and to disperse the said line-focused optical signal into its frequency components;
a second dispersive module oriented orthogonally with respect to said first dispersive module to receive and to further disperse the said dispersed optical signal in an orthogonal direction;
a second cylindrical lens arranged one focal length beyond the first dispersive element to receive and to collimate the said first dispersed optical signal;
a third cylindrical lens oriented orthogonally with respect to said second cylindrical lens and arranged one focal length beyond the second dispersive element to receive and to collimate the said second dispersed optical signal;
a polarization dependent spatial light modulator (SLM) having an active area comprising a plurality of independently addressable regions, the SLM arranged to receive the frequency components on the active area, said SLM arranged at the common back Fourier plane of the said second and said third cylindrical lenses, wherein the said SLM is capable of modulating the phase of the spectral components of the said laser pulses upon reverse propagation of said laser pulses;
a controller coupled to the SLM wherein during operation the controller causes the SLM to adjust the phase of one or more of the frequency components of the said signal;
a phase conjugate mirror (PCM) arranged to receive the said phase adjusted signal beyond the SLM and to generate a wavefront-reversed replica of the received signal, wherein said wavefront-reversed replica traverses the said optical components in reverse sequence, and wherein said circulator outcouples the said reverse-sequence beam;
a linear polarizer and a Faraday rotator arranged between said third cylindrical lens and said SLM; and
a quarter-wave plate arranged between said SLM and said PCM.