Rg. Ispasoiu et al., MEASUREMENT OF ENHANCED RADIANT POWER OF INTERNAL 2ND-HARMONIC GENERATION IN INGAAS GAAS/ALGAAS STRAINED SQW BH LDS, BY AN INDIRECT METHOD/, International journal of optoelectronics, 11(2), 1997, pp. 127-131
For the evaluation of internal second harmonic generation (ISHG) radia
nt power from InGaAs/GaAs/AlGaAs strained single quantum well buried h
eterostructure laser diodes (SQW BH LDs), we used a simple indirect me
thod based on photomultiplier response calibration with the aid of an
Ar+ laser tuned close enough to the ISHG wavelength. The observation o
f ISHG emission at similar to 476 nm, with radiant power of a few nano
watts, can ease the way for increased detection efficiency and higher
resolution in the near-field optical microscopy of the laser diode mir
ror facet.