Entity

Time filter

Source Type

Katlenburg-Lindau, Germany

Lagatsky A.A.,University of St. Andrews | Koopmann P.,University of Hamburg | Fuhrberg P.,LISA laser products | Huber G.,University of Hamburg | And 2 more authors.
Optics Letters | Year: 2012

We report on the passive mode locking of a Tm3+:Sc 2O3 laser at 2.1 μm using a semiconductor saturable absorber mirror based on InGaAsSb quantum wells. Transform-limited 218 fs pulses are generated with an average power of 210 mW. A maximum output power of 325 mW is produced during mode locking with the corresponding pulse duration of 246 fs at a pulse repetition frequency of 124.3 MHz. A Ti:sapphire laser is used as the pump source operating at 796 nm. © 2012 Optical Society of America. Source


Lagatsky A.A.,University of St. Andrews | Koopmann P.,University of Hamburg | Fuhrberg P.,LISA laser products | Huber G.,University of Hamburg | And 2 more authors.
2012 Conference on Lasers and Electro-Optics, CLEO 2012 | Year: 2012

Passive mode locking of a Tm:Sc2O3 laser at around 2 μm and 2.1 μm is reported. The shortest pulse duration of 218 fs is achieved with an average power of 210 mW at 2107 nm. © 2012 OSA. Source


Schmidt A.,Max Born Institute for Nonlinear Optics and Short Pulse Spectroscopy | Koopmann P.,University of Hamburg | Huber G.,University of Hamburg | Fuhrberg P.,LISA laser products | And 5 more authors.
Optics Express | Year: 2012

Single-walled carbon nanotube saturable absorbers were designed and fabricated for passive mode-locking of bulk lasers operating in the 2 μm spectral range. Mode-locked lasers based on Tm:Lu2O3 single crystals containing different Tm3+-doping concentrations were studied. Nearly transform-limited pulses as short as 175 fs at 2070 nm were generated at 88 MHz repetition rate. © 2012 Optical Society of America. Source


Koopmann P.,University of Hamburg | Lamrini S.,LISA laser products | Scholle K.,LISA laser products | Schafer M.,LISA laser products | And 2 more authors.
Optical Materials Express | Year: 2011

We present spectroscopic investigations and the first laser operation of Ho:Lu2O3. Laser operation was obtained with two different setups at room temperature: In a 1.9 μm diode pumped setup a maximum output power of 15Wwas achieved. With a Tm-fiber laser pumped setup the maximum output power was 5.2W and the slope efficiency was 54% with respect to the absorbed pump power. Absorption measurements revealed absorption cross sections of up to 11.7·10-21 cm2 at 1928 nm. In the 2.1 μm range a maximum emission cross section of 4.5 10-21 cm2 at 2124 nm was determined, which remains the highest gain peak even for high inversions. The fluorescence lifetime of the 5I7-manifold was found to be 10 ms. © 2011 Optical Society of America. Source


Koopmann P.,University of Hamburg | Lamrini S.,LISA laser products | Scholle K.,LISA laser products | Schafer M.,LISA laser products | And 2 more authors.
Optics Express | Year: 2013

Efficient room-temperature laser operation was obtained in the wavelength range from 2117nm to 2134nm with Ho:Lu2O3 and Ho:Y 2O3 as the active materials. With an FBG-stabilized Tm-doped fiber laser as the pump source, the maximum slope efficiency and output power of the Ho:Y2O3 laser were 63% and 18.8W, respectively. With Ho:Lu2O3 the respective values were 76 % and 25.2 W. With Ho:Sc2O3 as the active material the accessible wavelength range could be expanded to 2158 nm in a diode-pumped setup. © 2013 Optical Society of America. Source

Discover hidden collaborations