Abstract: A superconducting magnetic energy storage system for applying power to a load includes a superconducting magnet, the inductor of which is supplied with current via a source which may be preset to a desired value of current, and wherein a feedback loop responsive to a sensed current adjusts the source to provide the desired current. Energy from the superconducting magnet is transferred via a series of pulses of current from the magnet to a first capacitor for charging the capacitor to a desired voltage greater than the voltage at the superconducting magnet. A further transfer of energy, via a series of pulses of current, results in a charging of a second capacitor to a voltage lower than the voltage of the first capacitor. The second capacitor feeds the load.

Abstract: An information separation device that having a transformer operating as a separating filter to separate alternating voltage information and transmitted direct current power. The transformer has at least one winding on a first side coupled to the dc power. A capacitor is coupled to this winding, at whose ends direct current power is made available. The transformer has one winding on an information processing side. First and second valves are arranged in a transmitting branch parallel to the capacitor, the second winding being coupled at its first end between the first and second valves. Third and fourth valves are arranged in a branch parallel to the capacitor, the second winding being coupled in series at its first and second ends between the third and fourth valves in phase opposition to the first and second valves.

Abstract: A measurement circuit for measuring the level of an input electrical signal, the circuit comprising an input amplifier biased from a bias voltage, receiving the input signal, and producing an output signal, followed by a detector module itself followed by an integrator delivering an integration signal, these three components constituting a measurement channel, the integration signal being the sum of an offset signal and of a level signal which is proportional to the level of the input signal.

Abstract: The inventive optical fiber communication system comprises Si-based amplifier fiber whose core comprises Ge, Al, and Er. The amplifier fiber has an effective index difference (.DELTA.n) greater than 0.03, an effective core diameter a less than 3.5 .mu.m, a maximum Al concentration in the core of at least 6 mole %, a mode field diameter at the pump wavelength that is less than 5 .mu.m, a V-number at the pump wavelength in the range 1.4-2.0, a cut-off wavelength less than 1.4 .mu.m, and an Er distribution whose effective diameter is less than that of the Ge distribution. The fiber has advantageous properties including low amplification threshold and noise. Disclosed is also a method of making optical fiber that can be used to produce fiber having characteristics (e.g., .DELTA.n>0.03, high Al concentration) not generally obtainable with prior art methods.

Abstract: A DC to DC converter which gives two individually controlled and stabilized DC voltages includes an oscillator of the push-pull type and two rectifiers which are connected to the output of the oscillator. The transformer of the oscillator has a primary winding which has been split up in two halves, the end of each half being connected to a controlling DC voltage. The secondary winding of the oscillator transformer has its one end connected to the two rectifiers. The output of each of the rectifiers is connected to one input of a regulating circuit, the output of which is connected to each of the primary winding halves for delivering the controlling DC voltage.