Patent ID: 6580516
Filing Date: 2003-06-17
Classification: G01J,G02B,H01S

Abstract:
A tunable optical resonator comprising:a fixed mirror attached to a substrate having a first electrically conducting surface; a support member having a moveable mirror supported thereon, said support member having a second electrically conducting surface, said support member being suspended above said substrate such that said moveable mirror is separated from said fixed mirror by a distance; a light output port for transmitting a light signal of a wavelength determined by said distance, said transmitted light signal being characterized by a power level; an optical circuit for measuring said power level of said light signal and for generating an electrical signal that depends on said measured power level; and a frequency adjustment circuit, responsive to said electrical signal and a tuning voltage, for applying an electrical potential between said first and second electrically conducting surfaces, wherein said electrical potential causes said distance to remain at a distance determined by said tuning voltage independent of said power level for power levels less than a predetermined power level.