Patent ID: 9588398
Date: 2017-03-07
CPC Classifications: G02F,H01S

Claim:
1. An apparatus for generating a gigahertz-terahertz-range signal having a first frequency in a gigahertz to terahertz frequency range, the apparatus comprising: a pump laser that outputs pump light having a pump frequency; and a single cavity, operably coupled to the pump laser to receive the pump light, wherein the single cavity includes a first non-linear material in an optical path in the single cavity that receives the pump light and generates light that includes a first intermediate frequency and a second intermediate frequency, wherein the single cavity includes a first etalon tuned to pass just the first intermediate frequency, and wherein the single cavity includes a second non-linear material in the optical path in the single cavity that uses the light of the first intermediate frequency and the light of the second intermediate frequency to generate the gigahertz-terahertz-range signal, wherein the gigahertz-terahertz-range signal has a frequency that is equal to a difference between the two intermediate frequencies.