Room temperature visible distributed-feedback colour centre laser

Abstract

The distributed-feedback (DFB) colour centre laser is described. The DFB laser action at 680 nm is observed by pumping on LiF crystal containing F2 centres with the fringes formed by the interference of two coherent light beams.

Femtosecond-laser-encoded distributed-feedback color center laser in lithium fluoride single crystal

“…Next, we examined to fabricate a DFB F 2 color center laser using the holographic micrograting arrays encoded by interfered infrared femtosecond laser pulses. Oscillation of DFB F 2 color center laser in LiF was already reported by Kurobori et al [11]: however, the cavity of their DFB laser consisted of the transiently induced grating structure. There was no way to produce permanent gratings inside LiF.…”

Tunable distributed-feedback color center laser using stabilized F 2 +** color centers in LiF crystal

“…The construction of DFB lasers using F A (II) and N 2 CCs in KCl and F 2 CCs in LiF crystals was reported by G.C. Bjorklund 11 and Kurobori et al 12,13 . However, poor thermoand photo-stability were limiting factors in these crystals, and thus the lifetime of these lasers was short.…”

Effects of Birefringence on the Electromagnetic Guidance of Structures Produced by Femtosecond Laser

“…Studies on the equilibrium dynamics of the aggregate centers showed the possibility of provide a selective depopulation of one of the species [21]. The efficiency of the lithium fluoride optical pumping cycle allows a number of applications such as waveguides [22]- [27], color center lasers [28], including those with distributed feedback [29] periodic photorefractive structures [30] and even radiation detectors [31]. Radiation detectors are particularly interesting for imaging with confocal laser-scanning-microscopy using fluorescent excitation, allowing better resolution than conventional techniques and greater applicability in samples.…”