A. Ginolas
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View article: 420 W pulse power from a 905 nm distributed bragg reflector laser with multiple active regions and tunnel junctions
420 W pulse power from a 905 nm distributed bragg reflector laser with multiple active regions and tunnel junctions Open
We report a record-high pulse power of 420 W or a pulse energy of 4.2 μJ at a pulse current of 210 A, emitted by a single distributed Bragg reflector broad-area laser with 5 active regions separated by 4 tunnel junctions. The laser is oper…
View article: Experimental and theoretical studies into longitudinal spatial hole burning as a power limit in high-power diode lasers at 975 nm
Experimental and theoretical studies into longitudinal spatial hole burning as a power limit in high-power diode lasers at 975 nm Open
Spatial-hole-burning as a limit to the continuous-wave (CW) output power of GaAs-based diode lasers is experimentally studied. For 90 μm stripe lasers with 6 mm resonator length and 0.8% front facet reflectivity, spontaneous emission (SE) …
View article: Compact turnkey system for multi-contact diode lasers for portable spectroscopic applications
Compact turnkey system for multi-contact diode lasers for portable spectroscopic applications Open
Diode laser-based light sources allow the implementation of features to meet specific application requirements. Besides output power and specific wavelength, this can also include spectral tunability, an alternating operation between two d…
View article: Wavelength‐stabilized ns‐pulsed 2.2 kW diode laser bar with multiple active regions and tunnel junctions
Wavelength‐stabilized ns‐pulsed 2.2 kW diode laser bar with multiple active regions and tunnel junctions Open
The improvement of the performance of a distributed Bragg reflector laser bar emitting near 905 nm through the use of multiple epitaxially stacked active regions and tunnel junctions is reported. The bar consisting of 48 emitters (each hav…
View article: Wavelength-stabilized ns-pulsed 2.2 kW diode laser bar with multiple active regions and tunnel junctions
Wavelength-stabilized ns-pulsed 2.2 kW diode laser bar with multiple active regions and tunnel junctions Open
The improvement of the performance of a distributed Bragg reflector laser bar emitting near 905 nm through the use of multiple epitaxially stacked active regions and tunnel junctions is reported. The bar consisting of 48 emitters (each hav…
View article: Ten emitter dual-wavelength Y-branch DBR laser diode array emitting 1 W at 785 nm with a spectral emission width below 60 pm
Ten emitter dual-wavelength Y-branch DBR laser diode array emitting 1 W at 785 nm with a spectral emission width below 60 pm Open
We present a 5 mm wide ten emitter dual-wavelength Y-branch DBR laser diode array emitting at 785 nm with an output power of 1 W at both wavelengths. The two emission wavelengths are individually addressable. The emitters are spectrally st…
View article: A 1.4 kW 780 nm pulsed diode laser, high duty cycle, passively side-cooled pump module
A 1.4 kW 780 nm pulsed diode laser, high duty cycle, passively side-cooled pump module Open
A diode laser module emitting 1.4 kW optical in-pulse power near 780 nm optimized for high (≥ 10%) duty-cycle operation in a micro-channel free design is presented. With full collimation, a beam quality with a nearly symmetric M 2 of 205 ×…
View article: Non-uniform longitudinal current density induced power saturation in GaAs-based high power diode lasers
Non-uniform longitudinal current density induced power saturation in GaAs-based high power diode lasers Open
The output power of modern 975 nm GaAs-based broad area diode lasers is limited by increasing carrier and photon losses at high bias. We use experiment and one-dimensional calculations on these devices to reveal that higher current densiti…
View article: Wavelength stabilized high pulse power 48 emitter laser bars for automotive light detection and ranging application
Wavelength stabilized high pulse power 48 emitter laser bars for automotive light detection and ranging application Open
Diode lasers generating optical pulses with high peak power and lengths in the nanosecond range are key components for light detection and ranging systems, e.g. for autonomous driving and object detection. We present here an internally wav…
View article: Low-index quantum-barrier single-pass tapered semiconductor optical amplifiers for efficient coherent beam combining
Low-index quantum-barrier single-pass tapered semiconductor optical amplifiers for efficient coherent beam combining Open
The requirements for coherent combination of high power GaAs-based single-pass tapered amplifiers are studied. Changes to the epitaxial layer structure are shown to bring higher beam quality and hence improved combining efficiency for one …
View article: Novel High-Power, High Repetition Rate Laser Diode Pump Modules Suitable for High-Energy Class Laser Facilities
Novel High-Power, High Repetition Rate Laser Diode Pump Modules Suitable for High-Energy Class Laser Facilities Open
The latest generation of high-energy-class pulsed laser facilities, under construction or planned, such as EuPRAXIA, require reliable pump sources with high power (many kW), brightness (>1 MW/cm2/sr) and electro-optical conversion efficien…
View article: Characterisation and comparison between different S-bend shaped GaAs Y-branch distributed Bragg reflector lasers emitting at 976 nm
Characterisation and comparison between different S-bend shaped GaAs Y-branch distributed Bragg reflector lasers emitting at 976 nm Open
Passive S-bend waveguides have been thoroughly studied in the past, however active S-bend structures such as those in Y-branch distributed Bragg reflector (DBR) ridge waveguide (RW) lasers have been paid little attention. In this work, dif…
View article: Compact High Power Diode Laser MOPA System With 5.5 nm Wavelength Tunability
Compact High Power Diode Laser MOPA System With 5.5 nm Wavelength Tunability Open
A hybrid master oscillator power amplifier (MOPA) diode laser with 6.2 W output power at 971.8 nm is presented. It consists of a distributed Bragg reflector (DBR) laser, which is collimated and focused into a tapered amplifier using cylind…