Design and construction of a controlled Laser Switch

Abstract

‫A laser control system was designed and constructed in this work. Diode laser with wavelength 670nm and output power 1mW was used to operate the 555 timer and JK flip-flop for a different time intervals. The time high had been calculated and measured through the capacitor value of the circuit. The response of the electronic circuit was tested to work with different lasers. (i.e. He-Ne laser 632.8nm with output power 1mW, diode laser 820nm with output power 75mW, and using the diode laser 670nm, with output power 1mW). The electronic circuit was responded for all the lasers with wavelength in the visible portion only. To operate the circuit by a single laser wavelength, a suitable filter was selected, then the circuit had been operate with the diode laser 670nm only. This means that the electronic circuit was controlled and operated using one laser as switch. ‫.‪laser (670nm), was 50meter‬‬