29 January 2008 Monolithic 2D high-power arrays of long-wavelength VCSELs
Author Affiliations +
Proceedings Volume 6908, Vertical-Cavity Surface-Emitting Lasers XII; 690807 (2008); doi: 10.1117/12.763009
Event: Integrated Optoelectronic Devices 2008, 2008, San Jose, California, United States
InP-based, long-wavelength vertical-cavity surface-emitting lasers (LW-VCSELs) with buried tunnel junction are presented for high-power applications. Various studies of single-devices with large apertures and monolithically integrated two-dimensional VCSEL arrays are shown. The influence of aperture and array size on laser power, efficiency and divergence angle is investigated in detail. Unlike GaAs-based devices, large apertures are not favorable due to thermal issues. Accordingly, we focused on VCSEL arrays and derived scaling rules for optimum performance. This allows manufacturing high-power devices achieving continuous-wave (CW) optical powers in excess of 3 W at -11°C heat-sink temperature, circular far-field, low divergence angles around 20° and power densities of 130 W/cm2 at 1.55 μm. To the best of our knowledge, this is the highest power ever reported for a monolithic VCSEL array. At room temperature, more than 2 W is still available and high-temperature operation up to 70°C is applicable. The driving voltages around 1.2 V are significantly low, enabling single battery mobile operation. The wall-plug efficiency at room temperature exceeds 20% in a wide range. Addressing the array in sectors, we found that the array is very homogenous in performance with a standard deviation of less than 2.8%. Therefore, high-power applications can also be accomplished by VCSEL technology. As these novel devices with emission wavelengths beyond 1400 nm are less restrictive with respect to eye-safety, they are also favorable for free-space applications. Additionally, the devices may be used as concealed infra-red headlights that are invisible for all silicon-based detectors.
© (2008) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
W. Hofmann, M. Görblich, M. Ortsiefer, G. Böhm, M.-C. Amann, "Monolithic 2D high-power arrays of long-wavelength VCSELs", Proc. SPIE 6908, Vertical-Cavity Surface-Emitting Lasers XII, 690807 (29 January 2008); doi: 10.1117/12.763009; https://doi.org/10.1117/12.763009

Vertical cavity surface emitting lasers

High power lasers

Optics manufacturing

Continuous wave operation

Data transmission




Diode pumped high power cw all solid state laser at...
Proceedings of SPIE (May 04 1999)
Next generation 8xx nm laser bars and single emitters
Proceedings of SPIE (February 21 2011)
High power low noise VCSEL seed laser for fiber laser...
Proceedings of SPIE (February 05 2010)
Interband cascade distributed-feedback lasers
Proceedings of SPIE (February 02 2007)
Optical fiber transmission of 2 kW cw YAG laser and...
Proceedings of SPIE (August 01 1990)

Back to Top