Direct Measurement of Pump Intensity Distributions in an Optically Pumped Vertical-Cavity Surface-Emitting Laser
نویسندگان
چکیده
We have mapped the internal pump intensity distribution by monitoring the spontaneous emission intensity along the cleaved edge of an optically pumped vertical-cavity surface-emitting laser (VCSEL) using the high spatial resolution and shallow depth of field provided by near-field scanning optical microscopy (NSOM) [1]. The spontaneous emission of quantum wells placed throughout the distributed Bragg reflectors (DBR) is correlated to the pump intensity. Simulations performed using the transfer matrix method match well with the measurements presented. Viable optically pumped and hybrid opticallyelectrically pumped VCSELs and their applications have been limited by poor pump coupling sensitivity
منابع مشابه
Low-threshold optically pumped lÄ4.4mm vertical-cavity surface-emitting laser with a PbSe quantum-well active region
We report pulsed emission from an optically pumped lead-salt vertical-cavity surface-emitting laser with a PbSe/PbSrSe quantum-well active region. The lasing wavelength of l54.44 mm is nearly constant over the temperature range 200–280 K, and the threshold is only 10.5 kW/cm at 260 K, where the gain peak and cavity mode are in resonance. Over 330 mW of peak power is emitted at 260 K, into a cir...
متن کاملPump intensity profiling of vertical-cavity surface-emitting lasers using near-field scanning optical microscopy
We have mapped the internal pump intensity distribution of an optically pumped vertical-cavity surface-emitting laser. Spontaneous emission from quantum wells placed throughout the distributed Bragg reflectors is correlated to the pump intensity. The emission is monitored along the cleaved edge using the high spatial resolution and shallow depth of field provided by near-field scanning optical ...
متن کاملOperation of an optical in-well-pumped vertical-external-cavity surface-emitting laser.
We report the operation of an optical in-well-pumped vertical-external-cavity surface-emitting laser. The laser delivers 1 W at 855 nm and is pumped with a cost-effective fiber-coupled laser diode emitting at 806 nm. The laser modal gain is examined and ways of optimizing the system are investigated and discussed.
متن کاملVertical cavity surface emitting terahertz laser.
Vertical cavity surface emitting terahertz lasers can be realized in conventional semiconductor microcavities with embedded quantum wells in the strong coupling regime. The cavity is to be pumped optically at half the frequency of the 2p exciton state. Once a threshold population of 2p excitons is achieved, a stimulated terahertz transition populates the lower exciton-polariton branch, and the ...
متن کامل