Abstract: A new method for making a nonlinear optical structure for frequency conversion and for using that structure for frequency conversion is described. The nonlinear optical structure is made by depositing alternating contiguous layers of gallium arsenide and aluminum gallium arsenide onto a gallium arsenide substrate. Optical frequency conversion is performed by transmitting a pump laser beam through the structure. The new method is easier to perform than prior art methods.

Abstract: A new nonlinear optical structure for frequency conversion is described. The new nonlinear optical structure is a multilayer wafer comprising alternating layers of gallium arsenide and aluminum gallium arsenide onto a gallium arsenide substrate. The new device is both more efficient and easier to make than prior art gallium arsenide crystal structures designed for nonlinear optical conversion.

Abstract: An all-in-one, tug, toss, and bait training device is provided for training and/or playing with an animal, such as a dog. The device comprises a strap member having a first end portion, a second end portion, and middle portion positioned between the first end portion and the second end portion. A throwing member, such as a ball, is secured to the first end portion of the strap member. A handle is one of attached to and formed from the second end portion of the strap member. A holding member, such as a pouch for storing treats, squeaking devices and the like, is secured to the middle portion of the strap member. This training device may be adapted for use for teaching a variety of skills to several different breeds and sizes of dogs.