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- W1590271706 abstract "The possibility of wavelength tuning and insertion of intra-cavity control elements makes vertical external cavity surface emitting lasers (VECSEL) a useful tool for telecommunication and spectroscopic applications. Very small cavity lengths are desirable for achieving continuous single mode tuning and the fiber-based VECSEL is a simple device which avoids the complicated post-growth processing involved in the fabrication of a membrane-type laser. We report here on the successful operation of an optically-pumped fiber-based VECSEL in the 850 nm wavelength region. The device comprises a half cavity periodic gain structure made of 15 Al/sub 0.2/Ga/sub 0.8/As/GaAs quantum wells designed to be at the anti-nodes of the electric field standing wave, with a 30 pairs Al/sub 0.2/Ga/sub 0.8/As/AlAs distributed Bragg reflector (DBR) as the bottom mirror. The structure is similar to one previously described, used in a macroscopic external cavity geometry. The top mirror of our cavity is a dielectric DBR deposited onto the cleaved end of a single mode fiber whose distance from the semiconductor can be controlled via a piezoelectric actuator to allow for wavelength tuning. The aim of this work is to contribute to the understanding of the operation of this optically pumped fiber-based laser. By comparing the laser performance with the f finesseinesse of an empty cavity with otherwise identical geometry, we are able to conclude that the dominant photon loss mechanism is due to fundamental diffraction limits." @default.
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- W1590271706 date "2003-11-21" @default.
- W1590271706 modified "2023-09-23" @default.
- W1590271706 title "A fiber-based vertically emitting semiconductor laser at 850 nm" @default.
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- W1590271706 doi "https://doi.org/10.1109/leos.2002.1159492" @default.
- W1590271706 hasPublicationYear "2003" @default.
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