TY  - JOUR
A1  - Skoczowsky, Danilo
A1  - Jechow, Andreas
A1  - Menzel, Ralf
A1  - Paschke, Katrin
A1  - Erbert, Götz
T1  - Efficient second-harmonic generation using a semiconductor tapered amplifier in a coupled ring-resonator geometry
N2  - A new approach for efficient second-harmonic generation using diode lasers is presented. The experimental setup is based on a tapered amplifier operated in a ring resonator that is coupled to a miniaturized enhancement ring resonator containing a periodically poled lithium niobate crystal. Frequency locking of the diode laser emission to the resonance frequency of the enhancement cavity is realized purely optically, resulting in stable, single-frequency operation. Blue light at 488 nm with an output power of 310 mW is generated with an optical-to-optical conversion efficiency of 18%.
Y1  - 2010
UR  - http://www.opticsinfobase.org/
U6  - https://doi.org/10.1364/OL.35.000232
SN  - 0146-9592
ER  - 
TY  - JOUR
A1  - Raab, Volker
A1  - Skoczowsky, Danilo
A1  - Menzel, Ralf
T1  - Tuning high-power diodes with as much as 0.38 W of power and M2 = 1.2 over a range of 32 nm with 3-GHz bandwidth
Y1  - 2003
ER  - 
TY  - JOUR
A1  - Skoczowsky, Danilo
A1  - Jechow, Andreas
A1  - Stürmer, Herbert
A1  - Poßner, Torsten
A1  - Sacher, Joachim
A1  - Menzel, Ralf
T1  - Quasi-monolithic ring resonator for efficient frequency doubling of an external cavity diode laser
N2  - A quasi-monolithic second-harmonic-generation ring resonator assembled with miniaturized components is presented. The ring contains a 10-mm-long bulk periodically poled lithium niobate crystal for second-harmonic generation, four plane mirrors and two gradient-index lenses. All parts are mounted on a glass substrate with an overall size of 19.5 mmx8.5 mmx4 mm. As pump source a broad-area laser diode operated in an external resonator with Littrow arrangement is utilized. This external cavity diode laser provides near diffraction limited, narrow-bandwidth emission with an optical output power of 450 mW at a wavelength of 976 nm. Locking of the diode laser emission to the resonance frequency of the ring cavity was achieved by an optical self-injection locking technique. With this setup more than 126 mW of diffraction-limited blue light at 488 nm could be generated. The opto-optical conversion efficiency was 28% and a wall plug efficiency better than 5.5% could be achieved.
Y1  - 2010
UR  - http://www.springerlink.com/content/100502
U6  - https://doi.org/10.1007/s00340-009-3802-7
SN  - 0946-2171
ER  - 
TY  - THES
A1  - Skoczowsky, Danilo
T1  - Experimentelle Untersuchungen zur optischen Kopplung von Resonatoren für eine effiziente Frequenzverdopplung
Y1  - 2012
CY  - Potsdam
ER  - 
TY  - JOUR
A1  - Jechow, Andreas
A1  - Lichtner, Mark
A1  - Menzel, Ralf
A1  - Radziunas, Mindaugas
A1  - Skoczowsky, Danilo
A1  - Vladimirov, Andrei G.
T1  - Stripe-array diode-laser in an off-axis external cavity : theory and experiment
N2  - Stripe-array diode lasers naturally operate in an anti-phase supermode. This produces a sharp double lobe far field at angles ña depending on the period of the array. In this paper a 40 emitter gain guided stripe-array laterally coupled by off-axis filtered feedback is investigated experimentally and numerically. We predict theoretically and confirm experimentally that at doubled feedback angle 2a a stable higher order supermode exists with twice the number of emitters per array period. The theoretical model is based on time domain traveling wave equations for optical fields coupled to the carrier density equation taking into account diffusion of carriers. Feedback from the external reflector is modeled using Fresnel integration.
Y1  - 2009
UR  - http://www.opticsinfobase.org/oe/Issue.cfm
U6  - https://doi.org/10.1364/OE.17.019599
SN  - 1094-4087
ER  - 
TY  - JOUR
A1  - Jechow, Andreas
A1  - Lichtner, Mark
A1  - Menzel, Ralf
A1  - Radziunas, Mindaugas
A1  - Skoczowsky, Danilo
A1  - Vladimirov, Andrei G.
T1  - Stripe-array diode-laser in an off-axis external cavity : theory and experiment
N2  - Stripe-array diode lasers naturally operate in an anti-phase supermode. This produces a sharp double lobe far field at angles +/-alpha depending on the period of the array. In this paper a 40 emitter gain guided stripe-array laterally coupled by off-axis filtered feedback is investigated experimentally and numerically. We predict theoretically and confirm experimentally that at doubled feedback angle 2 alpha a stable higher order supermode exists with twice the number of emitters per array period. The theoretical model is based on time domain traveling wave equations for optical fields coupled to the carrier density equation taking into account diffusion of carriers. Feedback from the external reflector is modeled using Fresnel integration.
Y1  - 2009
UR  - http://www.opticsexpress.org/Issue.cfm
U6  - https://doi.org/10.1364/OE.17.019599
SN  - 1094-4087
ER  -