Dispersion management for microscope objectives

Direct and low-loss connection between a hollow-core optical fiber and a dispersion compensating fiber for dispersion-free delivery of short optical pulses in hollow-core fiber

“…10 Moreover, this approach suffers from high loss; the transmission efficiency is typically ∼ 60% (∼ -2.2 dB). 9 In this paper, we propose the design of a low-loss HCF interconnection to a dispersion-compensation fiber (DCF) which can compensate pulse broadening in HCFs. Our interconnection design is based on highly-precise mode-field matching of DCF and HCF via an intermediate graded-index (GRIN) fiber segment acting as a modefield adapter.…”

Space-time focusing of phase-stabilized nanojoule-level 2.5-cycle pulses to peak intensities ≫3×10¹³ W/cm² at 80 MHz

“…Non-dispersive reflective objectives have been used for this purpose [3], but their intrinsic obscuration usually limits the coupling efficiency to less than 10%, with a consequent decrease in peak intensity. Dispersion compensation of microscope objectives using chirped mirrors has resulted in sub-14-fs pulses [4], and very recently, sub-8-fs pulses were obtained with a 4-f pulse shaper arrangement based on a mechanically deformable mirror [5].…”