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This work is focused on the quick determination of characteristics of the atmospheric transmission media in optical band. Optical wireless links are briefly introduced. Two of the most important effects influencing optical signal properties in the atmosphere are shortly described. The goal of the work is in analysis of optical intensity profile. Due to the changes in the intensity profile we are able...
We have succeeded in controlling the optical beam profile by MEMS spatial light phase modulator experimentally. The modulator proposed by our group has 1-D array of bidirectional tilt-piston micromirrors driven by electrostatic force.
Summary form only given. Laser resonators with microscopic dimensions approaching the optical wavelength exhibit fundamentally new phenomena. Within microcavity laser diodes, reduced threshold currents are perhaps the most conspicuous token predicted for this regime. Here we discuss the operation of an oxide-confined vertical-cavity surface-emitting laser (VCSEL) featuring a submicroampere threshold...
The catastrophic optical damage level of a 780 nm AlGaAs laser diode is increased by extending the optical beam profile by using a low-Al-content layer in the cladding layer. A higher light output power can be obtained without increasing threshold current, and reliable operation for more than 1000 h at 60 mW output and 50 degrees C ambient is obtained.<<ETX>>
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