| 摘要 |
PCT No. PCT/SE92/00294 Sec. 371 Date Nov. 5, 1993 Sec. 102(e) Date Nov. 5, 1993 PCT Filed May 6, 1992 PCT Pub. No. WO92/20127 PCT Pub. Date Nov. 12, 1992.Method to arrange and adjust a laser that is stable with respect to external and internal influences, and which comprises at least three optical components consisting of a laser element (1), which can generate optical radiation within a wavelength band lambda 1- lambda 2, an optical collimator (2) that inside the laser collimates radiation emitted from the laser element, and a plane reflection grating (3) with parallel grating grooves, arranged such that the latter together with a flat reflection surface, which can be one end surface of the laser element, forms a resonator, that selects the radiation wavelength emitted by the laser. At least one optical component, which for instance can be (1), (2) or (3) is fixedly mounted in a holder, that for the purpose of adjusting the laser to a lasing condition can be turned about an axis, that is fixed in the device, such that the angle PHI between two directions, which are defined by the direction along the grating grooves (G) and by the direction of collimation (LO) of the radiation, varies within an interval that contains PHI =90 DEG and such that collimated radiation from the laser element, which at PHI =90 DEG is reflected back from the grating and returns to the radiation emitting portion of the laser element via the collimator (2), has a selected wavelength that lies within the band lambda 1- lambda 2. |
