Patent ID: 9638913
Date: 2017-05-02
CPC Classifications: B81C,G02B,H01L,H01S

Claim:
1. A tunable MEMS-FP filter comprising: a semiconductor or dielectric substrate, transparent to light in the wavelength range 100-3000 nm, having an upper and a lower face; a fixed reflector configured to accept input light, and attached to the lower face of the substrate; a bottom electrode disposed on the upper face of the substrate; an AR layer disposed on the upper face of the substrate; a moveable reflector having an upper and a lower face, supported by one or more suspension beams, and comprising a MEMS and multilayer dielectric DBR mirrors and a top electrode disposed on the upper face of the moveable reflector, wherein an air gap is formed between the lower face of the moveable reflector and the upper face of the substrate; wherein an optical cavity is formed between the fixed reflector and the moveable reflector, and the optical cavity includes a portion of the substrate between the fixed reflector and the bottom electrode; and a voltage source to supply voltage between the top electrode and the bottom electrode to change the cavity length of the optical cavity.