Spatial-spectral holographic correlator at 1536 nm using 30-symbol quadriphase- and binary-phase-shift keyed codes

Area of Science:

• Photonics
• Optical Communications
• Materials Science

Background:

• Advanced optical processing is crucial for high-capacity data transmission.
• Spatial-spectral holographic correlators offer unique capabilities for optical signal processing.
• Er(3+): Y(2)SiO(5) is a promising material for optical data storage and processing.

Purpose of the Study:

• To investigate the processing capabilities of a spatial-spectral holographic correlator for QPSK and BPSK codes.
• To demonstrate the simultaneous processing of different optical code types using a single apparatus.
• To evaluate the fidelity and characteristics of the generated optical correlations.

Main Methods:

• Utilized a spatial-spectral holographic correlator incorporating Er(3+): Y(2)SiO(5) spectral hole-burning material.
• Processed 30-symbol quadriphase-shift keyed (QPSK) and binary-phase-shift keyed (BPSK) optical codes.
• Operated within the 1536 nm wavelength, relevant to the 1550-nm telecommunications band.

Main Results:

• Successfully demonstrated the processing of both QPSK and BPSK codes within the same correlator.
• Achieved high-fidelity optical correlations for both code types.
• Observed low sidelobe characteristics in the correlations, as expected for the utilized codes.

Conclusions:

• Spatial-spectral holographic correlators are capable of processing diverse optical codes like QPSK and BPSK.
• The demonstrated apparatus offers a versatile solution for optical code processing.
• The results highlight the potential of these correlators for advanced optical communication systems.