Optical processing on a femtosecond time scale

S. H. Lee

V.L. da Silva, Yaron R. Silberberg, J.P. Heritage +3 more

Recently, interest in photon echo has been revived because of its potential application in time-domain optical memories1. Several demonstrations have been reported in gases and also bulk organic and inorganic materials at cryogenic temperatures2-4. In this paper, we report the observation of accumulated photon echo in Er doped optical fibers and demonstrate that these fibers can be used to store information on the subpicosecond time scale.

Chao Fang, Wenhao Wang, Qing Lou +3 more

Single crystal diamonds with strong NV− luminescence were prepared by high-pressure high-temperature method and followed by electron irradiation and annealing process. The stimulated emission and gain characteristics of NV− diamond in femtosecond time scale are also studied using the transient absorption technique. Stimulated emission was observed at 660–800 nm, with an optical gain displayed in the range of 680–725 nm. Further test revealed that the optical gain lifetime is 3.5 ns and the gain coefficient is 0.16 cm−1, demonstrating the potential realization of color center lasers.

Aleksander K. Rebane, Mikhail A. Drobizhev, Christophe Sigel +2 more

Maxim S. Pshenichnikov, Wim P. de Boeij, D. A. Wiersma

Phase-locked optical coherence experiments were performed on the 10 fs time scale. A 13 fs cavity-dumped Ti:sapphire laser was considered as an ideal source to extend these experiments to the 10 fs time scale due to extremely high amplitude and spectral stability. Femtosecond phase-locked heterodyne detected femtosecond stimulated photon echo (PL-HSPE) proved to be very useful for exploring the details of the optical dynamics of the optical system. The PL-HSPE involves a six-dimensional experiment governed by three times between four fs pulses, two relative phases between paired pulses, and signal amplitude.

Philipp Wessels, Bernhard Ruff, Tobias Kroker +3 more