Room-temperature operation of photopumped monolithic InP vertical-cavity laser with two air-gap Bragg reflectors

Chitica, N.; Strassner, M.
June 2001
Applied Physics Letters;6/18/2001, Vol. 78 Issue 25, p3935
Academic Journal
We demonstrate a long wavelength (λ=1.56 μm) vertical-cavity laser built on a low-loss resonator formed by two InP/air-gap Bragg reflectors. The monolithic, InP-based structure uses a periodic gain active region with six strain-compensated quantum wells. The photopumped vertical-cavity laser requires record low power density of only 370 W/cm2 to reach threshold at 25 °C. The equivalent threshold current density is estimated to be as low as 400 A/cm2. Continuous-wave operation is demonstrated up to 32 °C despite the low heat conductivity of the reflectors. The emission is single mode and a power of up to 110 μW has been coupled into a single-mode fiber. © 2001 American Institute of Physics.


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