1920 x 1152 Spatial Light Modulator

Diffraction Efficiency (1st-order) – This is the percentage of light measured in the 1st-order when writing a linear repeating phase ramp to the SLM as compared to the light in the 0th order when no pattern is written to the SLM. Diffraction efficiency varies as a function of the number of phase levels in the phase ramp. An example measurement, taken at 1064 nm is shown below left, for phase ramps with 4 to 32 phase levels between 0 and 2π. The plot below right shows sample 1 st order diffraction efficiency measurements, as a function of the phase ramp period, taken at various wavelengths.

High Phase Stability - Meadowlark Optics’ SLMs are known for having the highest phase stability on the market. Our backplanes are custom designed with high refresh rates and direct analog drive schemes resulting in phase ripple as low as 0.2% (0.002 π radians) for standard speed, and as low as 2% (0.02 π radians) for high-speed. Phase ripple is quantified by measuring the 1st order ripple as compared to the mean intensity while writing a repeating linear phase ramp to the SLM. 

High Power Capability- Meadowlark Optics’ Spatial Light Modulators have been tested for compatibility with high power pulsed and CW lasers. In the graph below, the optical response of the 1920 x 1152 pixel SLM was measured as the incident power was incremented up to 15 GW/cm2 peak power or 204 W/cm2 average power. A liquid cooling system is available to reduce thermal effects.