The unstable resonator with a stable resonator core.
نویسندگان
چکیده
منابع مشابه
Confocal unstable-resonator semiconductor laser.
GaAs/GaAlAs heterostructure lasers with a monolithic confocal unstable resonator were demonstrated. The curved mirrors satisfying the confocal condition were fabricated by etching. Close to threshold, the lasers operate in a single lateral mode with a nearly collimated output beam. A single-lobe far-field intensity distribution as narrow as 1.9 degrees full width at half maximum was measured.
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A rigorous analysis of the unstable Bessel resonator with convex output coupler is presented. The Huygens-Fresnel self-consistency equation is solved to extract the first eigenmodes and eigenvalues of the cavity, taking into account the finite apertures of the mirrors. Attention was directed to the dependence of the output transverse profiles; the losses; and the modal-frequency changes on the ...
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High-power high-brightness unstable-resonator edge-emitting semiconductor laser diodes with dry-etched curved mirrors were fabricated and characterized. The epitaxial structure was optimized for high output power operation and consists of a GaAs/AlGaAs gradedindex separate-confinement heterostructure (GRINSCH) with a single 980-nm-emitting InGaAs quantum well. The curved mirrors of the unstable...
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The Q-switched Nd:YAG laser operating in a single axial mode with a Fourier-transform-limited bandwidth is a useful source for nonlinear and high-resolution spectroscopic studies. In the past, single-axial-mode operation of the Nd:YAG laser received considerable attention,' and single-mode operation of a TEMNoo-mode Q-switched oscillator has been reported.2'3 More recently, single-mode operatio...
متن کاملExcess spontaneous-emission factor in unstable-resonator lasers.
The spontaneous-emission factor in an unstable-resonator semiconductor laser is enhanced by more than 2 orders of magnitude compared with that of a Fabry-Perot semiconductor laser having the same volume. A clear linkage has been observed among the spontaneous-emission factor, the waveguiding property, and the width of the lasing spectral envelope.
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ژورنال
عنوان ژورنال: Journal of Advanced Science
سال: 1998
ISSN: 1881-3917,0915-5651
DOI: 10.2978/jsas.10.2-3_164