Patent ID: 9557625
Date: 2017-01-31
CPC Classifications: G02F,H01S

Claim:
1. A frequency comb article comprising: an oscillator to produce an oscillator frequency comb comprising: a fiber amplifier to receive the oscillator frequency comb from the oscillator and to produce an amplifier frequency comb based on the oscillator frequency comb, the amplifier frequency comb comprising: an isolator interposed between the oscillator and the fiber amplifier to communicate the oscillator frequency comb to the fiber amplifier; a nonlinear fiber to receive the amplifier frequency comb from the fiber amplifier and to produce a spectrally broadened frequency comb based on the amplifier frequency comb, the spectrally broadened frequency comb comprising a third optical bandwidth that is greater than the second optical bandwidth; a frequency doubler to receive the spectrally broadened frequency comb from the nonlinear fiber and to provide a doubled frequency comb comprising: an interferometer in optical communication with the frequency doubler to receive the doubled frequency comb, wherein the fiber amplifier and the nonlinear fiber comprise a polarization maintaining fiber, and the oscillator and the frequency doubler are entirely polarization maintaining.