We report on the design, fabrication, and testing of an asymmetric ref
lection mode Fabry-Perot modulator using bacteriorhodopsin as the nonl
inear cavity material, The modulator was fabricated to be impedance ma
tched, resulting in high quality modulator performance. A large contra
st ratio of 61:1, a reflectivity of 94%, and a dynamic modulation rang
e of 55.5 at a pump; intensity of 26 mW/cm(2) were measured by this mo
dulator. (C) 1996 American Institute of Physics.