Abstract: A diode pumped doubling system employs a pump diode, a crystal and doubler in a laser cavity with the diode and is operated in a pulsed or low duty cycle pumping regimen, while the cavity length is sufficiently short to stabilize the transient responses to pulsed diode operation and produce stable and known or controlled energy output under the non-CW pumping regimen. The construction allows stable output to be maintained with much looser temperature control, and to be achieved during the initial turn-on interval of the laser diode. In a preferred embodiment, the device employs a doubler which is clamped across its non-critical axis, and is operated with a control system which creates isotherms in the active mode volume.

Abstract: A fiber optic connector system. A first connector (25) associated with the fiber (15) includes a fiber holder (40) and a first engagement member. A second complementary connector (30) includes a fiber receptacle (95) and a second engagement member (90). The fiber holder is maintained in a precise position by the second connector when the first and second engagement members engage one another. The second connector may be associated with a radiation source. Associated with the first connector is a contact element (75) electrically coupled to the first engagement member through a network (80) for establishing a defined electrical characteristic therebetween. A second contact element (92, 103) associated with the second connector is normally insulated from the second engagement member and is mounted relative to the second engagement member so that the first and second contact elements make electrical contact with each other when the first and second engagement members are mechanically engaged with each other.

Abstract: A resistor device comprises a first film of resistive material deposited on a dielectric substrate and having two terminal portions for connection to an electrical circuit, and a second film of resistive material deposited on the substrate in thermally-conductive contact with the first film and electrically isolated therefrom. The material of one of the films has a relatively high temperature coefficient of resistance, so that the resistance of that film can be utilized as an indication of the temperature of the other film.