Patent ID: 7446297

Claim:
A sensor for page-based optical data storage, the sensor comprising: a first partially-reflective mirror having a first and second side, wherein the first partially-reflective mirror transmits a portion of light incident on the first side; a second partially-reflective mirror disposed substantially collinear with and spaced apart from the first partially-reflective mirror and having a first and second side, wherein the second partially-reflective mirror reflects light oscillating with a first frequency and transmits light not oscillating with the first frequency; a first active layer disposed substantially collinear with and between the first and second partially-reflective mirrors and configured to absorb at least a portion of the light oscillating with the first frequency; a third partially-reflective mirror disposed substantially collinear with and spaced apart from the second partially-reflective mirror and having a first and second side, wherein the third partially-reflective mirror reflects light oscillating with a second frequency and transmits light not oscillating with the second frequency; and a second active layer disposed substantially collinear with and between the second and third partially-reflective mirrors, and configured to absorb at least a portion of the light oscillating with the second frequency.