Characterization of frequency noise on a broadband infrared frequency comb using optical heterodyne techniques.
We measure the frequency noise across a Cr:forsterite infrared frequency comb through the optical heterodyne beat of different comb teeth against stable continuous wave (CW) lasers. This sensitive measurement shows strong correlations of the frequency noise between spectral components of the comb, relative to a fixed optical frequency near the 1.3 micron carrier of the Cr:forsterite laser. The correlated frequency fluctuations are shown to arise from amplitude noise on the pump laser. We also report a preliminary comparison of excess noise that occurs during supercontinuum generation in both highly nonlinear fiber and an extruded glass microstructured fiber.
Kim
K
K
National Institute of Standards and Technology, 325 Broadway, Boulder, Colorado 80305, USA. kks@yonsei.ac.kr
Nicholson
J W
JW
Yan
M
M
Knight
J C
JC
Newbury
N R
NR
Diddams
S A
SA
D000465:Algorithms; D017076:Computer-Aided Design; D004867:Equipment Design; D019544:Equipment Failure Analysis; D005336:Fiber Optic Technology / Q000295:instrumentation*; D005374:Filtration / Q000295:instrumentation* / Q000379:methods; D007259:Infrared Rays; D007834:Lasers; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity