Femtosecond laser physics has been transformed by the advent of the titanium-doped sapphire laser, which has been mode locked by conventional and novel means (e.g., Refs. 1-7) and directly yielded pulses as short as 25 fs.' The observation of selfmode locking5 has led to the realization that the nonlinear refractive index of the laser medium can be used to provide both amplitude modulation, thr...

introduction: trichophyton rubrum is one of the most common species of dermatophytes which affects superficial keratinous tissue. it is not especially virulent but it can be responsible for considerable morbidity. although there are different therapeutic modalities to treat fungal infections, clinicians are searching for alternative treatment because of the various side effects of the present t...

We report a low-cost, 1 GHz repetition-rate, diode-pumped, saturable Bragg reflectors modelocked Cr:LiSAF laser, which generates nearly transform-limited 103-fs long pulses around 866 nm, with a record high peak power of 1.45 kW. 2010 Optical Society of America OCIS codes: (140.3460) Lasers; (140.3480) Lasers, diode pumped; (140.4050) Mode-locked lasers High repetition-rate femtosecond (fs) la...

We experimentally demonstrated femtosecond operation in a diode-pumped Yb:Y(3)Ga(5)O(12) laser for the first time, to the best of our knowledge. By using Gires-Tournois interferometer mirrors for dispersion compensation and a semiconductor saturable absorber mirror for passive mode locking, pulses with a duration as short as 245 fs at the central wavelength of 1045 nm have been produced at a re...

it is the output power and density of the lasers which determine whether a laser is a low or high-power one. if the density is less than 670mw/cm2, the laser is called a low power one. the output power of these lasers is usually less than 250mw. they use different mechanisms to accelerate wound healing such as: cellular biostimulation, improvement of circulation, vasodilation, analgesic and ant...

This paper reports automatic compensation of strong thermal lensing in a suspended 80 m optical cavity with sapphire test mass mirrors. Variation of the transmitted beam spot size is used to obtain an error signal to control the heating power applied to the cylindrical surface of an intracavity compensation plate. The negative thermal lens created in the compensation plate compensates the posit...

Background and Aim: Lasers can serve as a new powerful tool in dentistry. High intensity laser therapy is becoming the treatment of choice compared with conventional periodontal therapy due to accurate incision and soft and hard tissue ablation, hemostasis, reduction of postoperative pain and infection, optimal debridement, and enhanced healing. Although high intensity laser therapy assumes to ...

High repetition rate (10-50GHz) semiconductor mode-locked lasers (MLL) provide excellent performance in terms of stable output and high optical power and they are commonly investigated for optical frequency comb generation and optical code division multiple access (O-CDMA) networks [1, 2]. However, there have been few studies of monolithically integrated low frequency (< 2-GHz) semiconductor ML...