The first proof-of-concept demonstrations are presented for a broadband photonic-assisted analog-to-digital converter (ADC) based on spatial spectral holography (SSH). The SSH-ADC acts as a frequencydomain stretch processor converting high bandwidth input signals to low bandwidth output signals, allowing the system to take advantage of high performance, low bandwidth electronic ADCs. Demonstrations with 50 MHz effective bandwidth are shown to highlight basic performance with ∼5 effective bits of vertical resolution. Signal capture with 1600 MHz effective bandwidth is also shown. Because some SSH materials span over 100 GHz and have large time apertures (∼10 μs), this technique holds promise as a candidate for the next generation of ADCs.
- (070.1170) Analog optical signal processing
- (090.2900) Holographic recording materials
ASJC Scopus subject areas
- Atomic and Molecular Physics, and Optics