Ultrashort pulse compression and delivery in a hollow-core photonic crystal fiber at 540 nm wavelength

Abstract

We have fabricated a bandgap-guiding hollow-core photonic crystal fiber (PCF) capable of transmitting and compressing ultrashort pulses in the green spectral region around 532 nm. When propagating subpicosecond pulses through 1 m of this fiber, we have observed soliton-effect temporal compression by up to a factor of 3 to around 100 fs. This reduces the wavelength at which soliton effects have been observed in hollow-core PCF by over 200 nm. We have used the pulses delivered at the output of the fiber to machine micrometer-scale features in copper.

Spectral attenuation limits of silica hollow core negative curvature fiber

“…HCFs can be broadly divided into hollow core photonic bandgap fibers [1,2] and hollow core leaky mode fibers depending on the optical properties of the cladding structure. HCFs provide a new playground for study of light-gas interaction [3] and have many applications where the fiber material properties would usually become a limiting factor, such as in high power laser pulse delivery [4], mid-infrared and farinfrared wavelength transmission [5,6], ultrafast laser pulse transmission [7] and so forth.…”

Hollow-core photonic crystal fibre for high power laser beam delivery

“…However, recently, Wheeler et al demonstrated that Kagome HC-PCF could be spliced with comparable splice loss to that of PBG guiding ones, provided the HC-PCF is tapered [43] . Bandgap HC-PCF also finds applications in soliton generation [14] and pulse compression [44] . As a host for light-matter interactions [16,17] , which is one of the most advanced applications of HC-PCF, bandgap HC-PCF can enhance the interaction intensity by up to a millionfold because of its small core size and low optical attenuation.…”

Ultra low-loss hypocycloid-core Kagome hollow-core photonic crystal fiber for green spectral-range applications

“…The best-reported loss figure in PBG HC-PCF guiding, in this visible wavelength range, is 0.87 dB∕m at 557 nm [8]. This is limited by the combination of a large core-cladding mode optical overlap (>1%), and by surface roughness at the silica core-surround [9].…”