Use of a PVDF pyroelectric sensor for beam mapping and profiling of a mid-infrared diode laser
Anno: 2000
Autori: Toci G., Mazzoni M., Mazzinghi P.
Affiliazione autori: CNR, Istituto di Elettronica Quantistica, Firenze, Italy;
Istituto Nazionale di Ottica Largo E. fermi 6, 50125 Firenze, Italy
Abstract: A four-quadrant PVDF position sensor, originally designed for the alignment of mid-IR laser diodes beams, was also used for mapping and profiling the beam of a diode laser emitting few mu W at 5.8 mu m, by masking one quadrant with a 1 mm diameter pinhole or a 100 mu m width slit. This diagnostic system was used to optimize the laser collimating optics, determining a significant improvement in the spatial quality of the output beam, evaluated by means of the M-2 propagation factor. Since the laser diode modulation waveform required to optimize the pyroelectric detector responsivity is a fixed frequency square wave, quite different from that used in the normal spectroscopic application of the IR diodes, care was taken to have the same single-mode emission in the wavelength range of interest. The system was intended as a diagnostic and optimization tool for spectroscopic systems applied to environmental monitoring, but it may be used as a low cost device for the characterization of low power laser beams. (C) 2000 American Institute of Physics. [S0034-6748(00)04404-X].
Giornale/Rivista: REVIEW OF SCIENTIFIC INSTRUMENTS
Volume: 71 (4) Da Pagina: 1635 A: 1637
Parole chiavi: pyroelectric sensorDOI: 10.1063/1.1150554Citazioni: 2dati da “WEB OF SCIENCE” (of Thomson Reuters) aggiornati al: 2024-05-05Riferimenti tratti da Isi Web of Knowledge: (solo abbonati) Link per visualizzare la scheda su IsiWeb: Clicca quiLink per visualizzare la citazioni su IsiWeb: Clicca qui