Dresden 2014 – wissenschaftliches Programm

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HL: Fachverband Halbleiterphysik

HL 70: Semiconductor laser I: VECSEL and cascade lasers

HL 70.5: Vortrag

Mittwoch, 2. April 2014, 16:00–16:15, POT 112

Single-frequency vertical-external-cavity surface-emitting laser with output power exceeding 10 W and sub-MHz linewidth — •Fan Zhang1, Bernd Heinen1, Matthias Wichmann1, Christoph Möller1, Bernardette Kunert2, Wolfgang Stolz1, Arash Rahimi-Iman1, and Martin Koch11Department of Physics, Philipps-Universität Marburg, Marburg D-35032, Germany — 2NAsP III/V GmbH, Marburg D-35041, Germany

Vertical-external-cavity surface-emitting lasers (VECSELs) provide high power, highly coherent continuous-wave emission and a broad wavelength coverage (from UV to mid-IR) depending on the chip design. Moreover, the laser cavity can be extended by optical components, which allows for single-frequency operation. In recent years, single-frequency VECSELs have been intensively investigated. They have the potential to combine a high output power, a narrow linewidth and a large frequency tunability in one device. Such lasers are desirable tools for numerous applications, ranging from spectroscopy, metrology to optical free-space telecommunication. Here, we demonstrate a single-frequency VECSEL working at 1030 nm, and exceeding 10 W output power with sub-MHz linewidth at the same time. A maximum output power of 11 W is achieved at a net incident pump power of 42 W. Furthermore, an external Fabry-Perot cavity was used as frequency discriminator to measure the stability of the free-running laser. At a sampling time of 1 ms, we yield a considerably narrow linewidth, which is mainly limited by the mechanical vibrations and acoustical noise, of 750 kHz.

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