Electro-optic light beam deflector

Abstract

Fig. 2-Graphical presentation of the inequality (51 frequency ratio fdfi. between the dynamic quality factor yfc./fi and the With a given diode ( i e . a given -ifc) and a given pump frequency fp =fi+fz the inequality (5) is met for all signal frequencies only if the condition -d o > W P (6)holds. This condition is practically always satisfied.We have thus shown that the simultaneous use of the photo diode as a parametric amplifier diode degrades the SNR of the receiver. The underlying physical cause is the fact that in a photo paramp the photo diode in the signal circuit must be heavily mismatched, and that the shot noise of the photo current at the idler frequency is additionally transformed into the signal circuit.

Electro‐optic Devices

“…This type of device typically requires a voltage much higher than the half-wave voltage V π to resolve N spots [16]. An analog scanner based on a gradient index of refraction [23] is shown in Fig. 13.…”

“…Electro-optic devices have been developed for analog and digital signal processing [13], information processing [14], optical computing [14,15], optical interconnects [16,17], sensing [13,15], biophotonics, and metrology [18][19][20][21][22]. Devices to support these applications include Givens rotation devices [23], correlators [24], A/D converters [25], multichannel processors [26], matrix-matrix and matrix-vector multipliers [26], sensors for detecting temperature, humidity, and radio-frequency electrical signals [11,13,15], and artificial compound eyes [27].…”

<title>Laser Scanning Techniques</title>

“…A linear variation in phase delay was obtained in early deflectors by two different techniques: (1) the generation of a voltage gradient across an electro-optic crystal through the use of quadrapole electrodes, [14,44 and 46 J and (2) the use of uniform electric fields in arrays of triangular electrooptical crystal prisms arranged to provide cumulative refractive index changes at all interfaces Cl4, 47 and 48], Fowler [14] reported deflection resolutions of 44 and 53, respectively, in a 10-inch gradient deflector and a 12-inch prism deflector, both incorporating crystals of potassium dihydrogen phosphate. Voltages of the order of 15 kV were required.…”

Planar Structured Three-Dimentional Light Beam Deflector Using Prism Shaped Electrode and Space-Charge-Controlled Electrooptic Effect

“…Many types of light beam deflector [1][2][3][4][5][6] have been studied on the basis of the myriads of physical effects and structures. These devices have been used in telecommunication systems, printers and displays.…”