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Impact of photon lifetime on thermal rollover in 850-nm high-speed VCSELs

P. P. Baveja ; Benjamin Kögel (Institutionen för mikroteknologi och nanovetenskap, Fotonik) ; Petter Westbergh (Institutionen för mikroteknologi och nanovetenskap, Fotonik) ; Johan S. Gustavsson (Institutionen för mikroteknologi och nanovetenskap, Fotonik) ; Åsa Haglund (Institutionen för mikroteknologi och nanovetenskap, Fotonik) ; D. N. Maywar ; G. P. Agrawal ; Anders Larsson (Institutionen för mikroteknologi och nanovetenskap, Fotonik)
Proceedings of SPIE - Conference on Vertical-Cavity Surface-Emitting Lasers XVI (VCSELs) / SPIE Photonics West Symposium, San Fransisco, 25-26 January 2012 (0277-786X). Vol. 8276 (2012),
[Konferensbidrag, refereegranskat]

We present an empirical thermal model for VCSELs based on extraction of temperature dependence of macroscopic VCSEL parameters from CW measurements. We apply our model to two, oxide-confined, 850-nm VCSELs, fabricated with a 9-mu m inner-aperture diameter and optimized for high-speed operation. We demonstrate that for both these devices, the power dissipation due to linear heat sources dominates the total self-heating. We further show that reducing photon lifetime down to 2 ps drastically reduces absorption heating and improves device static performance by delaying the onset of thermal rollover. The new thermal model can identify the mechanisms limiting the thermal performance and help in formulating the design strategies to ameliorate them.

Nyckelord: carrier leakage, photon lifetime, thermal effects, vertical cavity surface emitting lasers, Design strategies, Heat sources, High-speed, High-speed operation, Self-heating, Static performance, Temperature dependence, Thermal model, Thermal Performance, Thermal rollover, Vertical cavity surface emitting laser, Photons, Thermography (temperature measurement), Surface emitting lasers

Denna post skapades 2012-04-19. Senast ändrad 2016-04-11.
CPL Pubid: 156880


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Institutioner (Chalmers)

Institutionen för mikroteknologi och nanovetenskap, Fotonik



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