Highly efficient heat extraction by double diamond heat-spreaders applied to a vertical external cavity surface-emitting laser

Abstract

We compare the heat extraction efficiency for a standard Vertical External Cavity Surface-Emitting Laser and the distributed Bragg reflector (DBR)-free structure employing a single and double diamond heat-spreaders, respectively. Both heterostructures grown by Molecular Beam Epitaxy employ two identical active regions designed for emission at 980 nm. We show that the thermal resistance has been decreased 15 times when there is no DBR and heat is extracted from both side of active region. For DBR-free laser no thermal rollover of power conversion characteristic was observed in the range of considered input powers.

16 W DBR‐free membrane semiconductor disk laser with dual‐SiC heatspreader

“…For lasing wavelengths near 1 µm, the single heatspreader geometry has demonstrated an output power of 6 W when directly bonded to diamond [8]. Recently, using a single SiC heatspreader, Mirkhanov et al [9] reported 6 W of output power at a coolant temperature of 12°C, and 10.1 W at −10°C, while dual‐diamond‐heatspreader DBR‐free SDLs have yielded 3.5 W, thus far limited solely by the available pump power [10]. In this paper, we directly compare the laser performance of DBR‐free SDLs using these two geometries.…”

Growth and characterization of InP-based 1750 nm emitting membrane external-cavity surface-emitting laser

“…The epitaxial structure is bonded to a single or in-between two transparent heat sinks. Single crystal diamonds are most frequently used as heat sinks due to their high thermal conductivity [27]]. The more cost-effective SiC is also widely used, since single samples of large, good optical quality crystal are available [28,29].…”

Parameterized reinforcement learning for optical system optimization

“…Recent optical systems, e.g. light-emitting diodes (LEDs, [11,30,72]) or verticalexternal-cavity surface-emitting-lasers [8,20], feature multilayer thin films, which transmit or reflect designated parts of the wave spectrum to achieve a certain functionality [34,39]. For example, multi-layer thin films are widely used for antireflection coating [1,14,49,59,60].…”