The double-pass erbium-doped zirconia fiber amplifier (EDZFA) is proposed and demonstrated to provide a wide-band amplification as well as flat-gain operation in both the Cand L-band regions using only a single-gain medium. The proposed amplifier utilizes an erbium-doped zirconia fiber (EDZF) with erbium ion concentration of 2800 ppm as a gain medium. The medium is fabricated in a ternary glass...

BACKGROUND AND OBJECTIVE Ablative fractional lasers were introduced for treating facial rhytides in an attempt to achieve results comparable to traditional ablative resurfacing but with fewer side effects. However, there is conflicting evidence on how well this goal has generally been achieved as well as on the comparative value of fractional CO(2) and Er:YAG lasers. The present study compares ...

We present the Erbium (4)I(11/2) and (4)I(13/2) complete polarized spectroscopic investigation on a series of Er(3+),Ce(3+):BaY(2)F(8) single crystals as a function of Cerium concentration. The main results of room temperature lifetime investigation show that the (4)I(13/2) lifetime reduces from 15.6 ms to 10 ms, the (4)I(11/2) lifetime reduces from 8.3 ms to 0.2 ms and (4)S(3/2) lifetime reduc...

Mode-locked Erbium fiber oscillator with pulse energy up to 58 nJ is experimentally demonstrated, the highest value to our best knowledge. The broadest spectrum corresponds to a transform-limited pulse of 93 fs duration.

Developing of new rare-earth (RE)-doped optical fibres for power amplifiers and lasers requires continuous improvements in the fibre spectroscopic properties (like shape and width of the gain curve, optical quantum efficiency, resistance to spectral hole burning and photodarkening,...). Silica glass as a host material for fibres has proved to be very attractive. However some potential applicati...

OBJECTIVE The purpose of this study was to evaluate the efficacy of erbium lasers for retrograde endodontic treatment, in terms of clinical outcome and therapeutic success. BACKGROUND DATA Apicoectomy with retrograde filling is a well-established surgical procedure to treat teeth affected by persistent periapical lesions. The apical root end is generally removed with burs, and the adjacent pe...

A new concept for an infrared waveguide detector based on silicon is introduced. It is fabricated using silicon-on-insulator material, and consists of an erbium-doped p–n junction located in the core of a silicon ridge waveguide. The detection scheme relies on the optical absorption of 1.5m light by Er ions in the waveguide core, followed by electron–hole pair generation by the excited Er and s...