Investigation of possible microcavity effect on lasing threshold of nonradiative-scattering-dominated semiconductor lasers
... have no positive effect on the reduction of the pump threshold density of a laser oscillator, provided that the relaxation of the carriers in the excited state is not dominated by the rate of spontaneous emission. It should be pointed out, however, that for oscillators based on nonlinear optical pro ...
... have no positive effect on the reduction of the pump threshold density of a laser oscillator, provided that the relaxation of the carriers in the excited state is not dominated by the rate of spontaneous emission. It should be pointed out, however, that for oscillators based on nonlinear optical pro ...
Observation of Collective Friction Forces due to Spatial Self
... measure the relative time phase between intracavity and pump light by heterodyning the cavity emission with frequency-shifted pump light. For a nearly stationary atomic ensemble, the phase of the intracavity light remains approximately constant, with drifts of less than =9 over 1 ms. If a randomi ...
... measure the relative time phase between intracavity and pump light by heterodyning the cavity emission with frequency-shifted pump light. For a nearly stationary atomic ensemble, the phase of the intracavity light remains approximately constant, with drifts of less than =9 over 1 ms. If a randomi ...
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... light is measured and an absorption coefficient of medium inside the cavity at this laser frequency is obtained. Considering the application of an optical switch used for the interruption of laser beam in CW-CRDS, the trigger signal to it is always extracted by splitting the detected signal in cavit ...
... light is measured and an absorption coefficient of medium inside the cavity at this laser frequency is obtained. Considering the application of an optical switch used for the interruption of laser beam in CW-CRDS, the trigger signal to it is always extracted by splitting the detected signal in cavit ...
Method for compensation of thermally induced modal
... temperature gradient will form in the substrate that modifies the temperature-dependent index of refraction. The indices of refraction of most optical materials increase with increasing temperature, resulting in the formation of a positive lens. The spherical part of the lens will focus the beam and ...
... temperature gradient will form in the substrate that modifies the temperature-dependent index of refraction. The indices of refraction of most optical materials increase with increasing temperature, resulting in the formation of a positive lens. The spherical part of the lens will focus the beam and ...
Mode-locking
Mode-locking is a technique in optics by which a laser can be made to produce pulses of light of extremely short duration, on the order of picoseconds (10−12 s) or femtoseconds (10−15 s).The basis of the technique is to induce a fixed-phase relationship between the longitudinal modes of the laser's resonant cavity. The laser is then said to be 'phase-locked' or 'mode-locked'. Interference between these modes causes the laser light to be produced as a train of pulses. Depending on the properties of the laser, these pulses may be of extremely brief duration, as short as a few femtoseconds.