| 摘要 |
<p>A broadly tunable semiconductor laser source having at least two semiconductor lasers, composed of dissimilar gain media, positioned in close proximity to one another, with an optical element for collimating the output of the semiconductor lasers, and a dispersive element to overlap the collimated beams with a microelectronic controller, which switches each laser on and off and sets the bias conditions for each laser. The output beams can be made parallel by design of the grating dispersion in combination with the lens, with small aiming corrections provided by mechanical actuation of the grating. The tunable source can be used for spectroscopy and spectroscopic imaging over a broad frequency range where the gain media are chosen for emission at frequencies of interest.</p> |
