We have applied the frequency-modulation (FM) technique in the 1.5 µm wavelength region to observe saturated absorption in ammonia in hollow-core photonic bandgap fibers (HC-PBFs). Previously blended lines have been resolved.
Mathieu HautefeuilleJuan Hernández-Cordero
Anna Maria HoukRubayet Al MarufNa Young KimMichal Bajcsy
Khay M. TanGajendra SinghC. Simon HerringtonC. T. A. Brown
Jan HaldJ. O. HenningsenJan C. Petersen