Martin Engelbrecht
Current Organizations / Institutes
The organizations/institutes from the scholar's latest article
Research Subjects
Martin Engelbrecht has a total of 9 co-authors. Here are the top co-authors by number of shared publications:
Dieter Wandt
Laser Zentrum Hannover e.V., Hollerithallee 8
3 shared publicationsDietmar Kracht
Laser Zentrum Hannover e.V., Hollerithallee 8
3 shared publicationsAxel Ruehl
Laser Zentrum Hannover e.V., Hollerithallee 8
2 shared publicationsFrithjof Haxsen
Laser Zentrum Hannover e.V., Hollerithallee 8
2 shared publications- Carsten Fallnich
University of Munster
1 shared publication D. Kracht
Laser Zentrum Hannover e.V., Hollerithallee 8, 30419 Hannover, Germany
1 shared publication
Latest Publications
- 27 March 2008
- Published by Optica Publishing Group in Optics Letters
- Vol. 33 (7) , 690-692
Ultrafast thulium-doped fiber-oscillator with pulse energy of 43 nJ
A femtosecond fiber laser based on thulium-doped double-clad silica fiber with an internal dispersion compensation is presented that generates pulses at a center wavelength of with an energy of and a duration of . The dechirped pulse duration is . The pulse energy is more than 2 orders of magnitude above the pulse energy demonstrated previously. Mode locking is achieved using additive pulse mode locking, and dispersion compensation is facilitated by a grating stretcher arrangement.- 27 March 2008
- Published by Optica Publishing Group in Optics Letters
- Vol. 33 (7) , 690-692
Ultrafast thulium-doped fiber-oscillator with pulse energy of 43 nJ
A femtosecond fiber laser based on thulium-doped double-clad silica fiber with an internal dispersion compensation is presented that generates pulses at a center wavelength of with an energy of and a duration of . The dechirped pulse duration is . The pulse energy is more than 2 orders of magnitude above the pulse energy demonstrated previously. Mode locking is achieved using additive pulse mode locking, and dispersion compensation is facilitated by a grating stretcher arrangement.- 1 January 2008
- Published by Optica Publishing Group in Optics Express
- Vol. 16 (3) , 1610-1615
Wavelength resolved intracavity measurement of the cross sections of a Tm-doped fiber
The wavelength dependent measurement of the relaxation oscillation frequency in a laser oscillator allows the study of the three- and four-level nature of the active material. Accordingly we present a tunable thulium doped fiber laser that covers the transition from three- to four-level operation at 2025 nm, characterized by the vanishing occupation of the terminal laser level. The laser is tunable from 1864nm to 2075nm with a linewidth below 0.3 nm. A maximum output power of 3.8W at 1930nm was achieved with a slope efficiency of 33.6% and an absorbed pump power of 17.5W. Absorption and emission cross sections were derived over the tuning range by an intracavity measurement method.
- 1 January 2008
- Published by Optica Publishing Group in Optics Express
- Vol. 16 (3) , 1610-1615
Wavelength resolved intracavity measurement of the cross sections of a Tm-doped fiber
The wavelength dependent measurement of the relaxation oscillation frequency in a laser oscillator allows the study of the three- and four-level nature of the active material. Accordingly we present a tunable thulium doped fiber laser that covers the transition from three- to four-level operation at 2025 nm, characterized by the vanishing occupation of the terminal laser level. The laser is tunable from 1864nm to 2075nm with a linewidth below 0.3 nm. A maximum output power of 3.8W at 1930nm was achieved with a slope efficiency of 33.6% and an absorbed pump power of 17.5W. Absorption and emission cross sections were derived over the tuning range by an intracavity measurement method.
- 1 November 2007
- Published by Elsevier in Optics Communications
- Vol. 279 (1) , 173-176
Tunable, μs-pulsed ytterbium fiber laser system with a linewidth below 2.7GHz
- 1 November 2007
- Published by Elsevier in Optics Communications
- Vol. 279 (1) , 173-176
Tunable, μs-pulsed ytterbium fiber laser system with a linewidth below 2.7GHz
- Open Access
- 1 January 2007
- Published by Optica Publishing Group in Optics Express
- Vol. 15 (8) , 4617-4622
Single-Frequency ytterbium-doped fiber laser with 26 nm tuning range.
A core-pumped ytterbium-doped fiber laser is presented, tunable over 26 nm from 1017 nm to 1043 nm. A diffraction grating pair in Littman-Littrow configuration in the unidirectional ring-cavity provides the wavelength adjustment. The laser resonator with a free spectral range of 260 MHz supported stable single frequency operation with a maximum linear polarized output power of 31 mW.
- 1 January 2007
- Published by Optica Publishing Group in Optics Express
- Vol. 15 (8) , 4617-4622
Open AccessSingle-Frequency ytterbium-doped fiber laser with 26 nm tuning range.
A core-pumped ytterbium-doped fiber laser is presented, tunable over 26 nm from 1017 nm to 1043 nm. A diffraction grating pair in Littman-Littrow configuration in the unidirectional ring-cavity provides the wavelength adjustment. The laser resonator with a free spectral range of 260 MHz supported stable single frequency operation with a maximum linear polarized output power of 31 mW.
- 10 December 2005
- Published by Institute of Electrical and Electronics Engineers (IEEE)
- Vol. 2, 1301
Four-wave-mixing suppression in Er/sup 3+/ fiber amplifiers by backward pumping
By backward pumping of an erbium doped fiber amplifier additional spectral components resulting of four wave mixing outside the original pulse chirp were suppressed leading to a substantially improved recompression of the amplified signal.
- 10 December 2005
- Published by Institute of Electrical and Electronics Engineers (IEEE)
- Vol. 2, 1301
Four-wave-mixing suppression in Er/sup 3+/ fiber amplifiers by backward pumping
By backward pumping of an erbium doped fiber amplifier additional spectral components resulting of four wave mixing outside the original pulse chirp were suppressed leading to a substantially improved recompression of the amplified signal.