We demonstrate a generation of three lasing wavelengths with the assistance Rayleigh backscattering as stabilizer peak power variations. The proposed laser consists combination semiconductor optical amplifier (SOA) and erbium-doped fiber (EDFA) amplifying media. Three Bragg gratings are employed selective wavelength selectors at 1544, 15747 1550 nm. At 110 mA SOA current 18 dBm EDFA output powe...

A wideband tunable fiber ring lasers using 253.3-cm long La-codoped bismuth-based erbium doped fiber and a narrowband tunable MEMS filter are reported. The fiber ring laser is capable of tuning over 80 nm continuously from 1545 to 1625 nm with an average output power of -3 dBm and extinction ratio of 60 dB.

PURPOSE To evaluate the safety and effectiveness of a novel nonablative 1,550 nm erbium-doped fiber laser in the treatment of facial and non-facial photodamaged skin. METHODS 50 patients with mild to moderate cutaneous photodamage, rhytides, and dyspigmentation received 3 successive treatments at 3-4 week intervals with a 1,550 nm erbium-doped fiber laser (Fraxel, Reliant Technologies Inc., S...

Thermal effects, which limit the average power, can be minimized by using low-doped, longer gain fibers, whereas the presence of nonlinear effects requires use of high-doped, shorter fibers to maximize the peak power. We propose the use of varying doping levels along the gain fiber to circumvent these opposing requirements. By analogy to dispersion management and nonlinearity management, we ref...

A novel and simple technique, based on nonlinear polarization rotation (NPR) effect, to generate stable multiwavelength oscillations in an erbium-doped fiber laser is proposed and successfully demonstrated. The NPR effect effectively induced intensity- and wavelength-dependent loss to alleviate mode competition caused by homogeneous gain broadening in erbium-doped fibers. Up to 28-wavelength la...

A dual-wavelength erbium fiber laser with single-longitudinal-mode characteristic is proposed and demonstrated. The system uses a 7-m-long highly doped erbium-doped fiber as the primary gain medium while two fiber Bragg gratings (FBGs) act as a wavelength selection mechanism. The sensing capability of the FBGs gives this source the possibility to be also used in a dual-sensor multiplexing schem...

In this work, we propose and experimentally demonstrate a new distributed short linear cavity fiber laser. At one of the ends, fabricated by commercial femtosecond laser chirped pulse amplifier, an artificially controlled backscattering erbium doped section has been connected. This reflector acts also as saturable absorber, leading to generation tunable switchable single longitudinal-mode emiss...

An all-fiber amplifier for a single-frequency blue laser was demonstrated for the first time, to the best of our knowledge. Over 150 mW continuous-wave single-transverse-mode blue laser output was obtained with a 10 m 1000 ppm thulium-doped fluoride fiber pumped by a 1125 nm fiber laser at a power of 2 W. The output power was limited due to the onset of the competitive lasing at 783 nm. Photoda...

This thesis reports work on passive mode-locking of thulium-doped and erbium-doped fiber ring lasers using the technique of polarization additive pulse mode-locking (PAPM). A self-starting, mode-locked Tm+3-doped fiber laser was demonstrated with 360 to 500 fsec pulses tunable from 1.8 to 1.9 pm, the largest tuning range demonstrated from a rare-earth doped fiber. This laser operated in the sol...

Efficient light generation on silicon is desirable for a variety of applications because of its low fabrication cost relative to III/V semiconductors and because it will enable monolithic integration with electronic components on the same Si platform. We studied silicon-rich silicon nitride with emission in the visible and erbium-doped silicon nitride (Er:SiNx) with emission at 1540 nm. Both of...