Abstract: Microlens array formation and alignment to heterogeneously integrated optoelectronic devices. Optoelectronic devices are printed or transferred in a single process step while also creating inactive optoelectronic devices that are precisely shaped for alignment purposes rather than for optical or electrical performance. Microlenses are integrated monolithically. The microlenses are aligned directly to a fiducial generated by the device integration step, reducing overall misalignment. Additionally, we use specific optical designs for the lenses to add novel functionalities to the system. By designing the lenses with engineered offsets, distances and curvatures with respect to the arrays of optoelectronic devices, we control properties of light such as: angles, phase, beam widths, and wavelength dependence.

Abstract: Recent remarkable progress in wave-front shaping has enabled control of light propagation inside linear media to focus and image through scattering objects. In particular, light propagation in multimode fibers comprises complex intermodal interactions and rich spatiotemporal dynamics. Control of physical phenomena in multimode fibers and its applications is in its infancy, opening opportunities to take advantage of complex mode interactions. Various embodiments of the present technology provide wave-front shaping for controlling nonlinear phenomena in multimode fibers. Using a spatial light modulator at the fiber's input and a genetic algorithm optimization, some embodiments control a highly nonlinear stimulated Raman scattering cascade and its interplay with four wave mixing via a flexible implicit control on the superposition of modes that are coupled into the fiber.

Abstract: A compact bi-telecentric device includes refractive lenses and takes in light from a grid of emitters at the object plane and images them to a grid of receivers. It provides the capacity to combine multiple wavelengths of emitters at the object plane into a single receiver. The device is quite compact, less than 25 mm in length from object to image, and having a maximum diameter for any element of less than 4 mm. The device includes four optical lens elements, three of which have a positive focal length and one of which has a negative focal length. The device includes at least one diffractive optical element. The lens elements are separated into two distinct groups which each have positive optical power, separated by an aperture stop which may or may not be enabled by a physical surface. A diffractive element enables wavelength division multiplexing and compensates for distortion from the bi-telecentric device.

Abstract: Controlling the propagation and interaction of light in complex media has sparked major interest. Unfortunately, spatial light modulation devices suffer from limited speed precluding real-time applications (e.g., imaging in live tissue). To address this problem, various embodiments use a phase-control technique to characterize complex media based on use of fast 1D spatial modulators and 1D-to-2D transformation performed by the same medium being analyzed. Some embodiments use a micro-electro-mechanical grating light valve (GLV) with 1088 degrees of freedom modulated at 350 KHz, enabling unprecedented high-speed wavefront measurements. Some embodiments continuously measure the transmission matrix, calculate the optimal wavefront and project a focus through various dynamic scattering samples in real-time, (e.g., within 2.4 ms per cycle).

Abstract: Recent remarkable progress in wave-front shaping has enabled control of light propagation inside linear media to focus and image through scattering objects. In particular, light propagation in multimode fibers comprises complex intermodal interactions and rich spatiotemporal dynamics. Control of physical phenomena in multimode fibers and its applications is in its infancy, opening opportunities to take advantage of complex mode interactions. Various embodiments of the present technology provide wave-front shaping for controlling nonlinear phenomena in multimode fibers. Using a spatial light modulator at the fiber's input and a genetic algorithm optimization, some embodiments control a highly nonlinear stimulated Raman scattering cascade and its interplay with four wave mixing via a flexible implicit control on the superposition of modes that are coupled into the fiber.

Abstract: Recent remarkable progress in wave-front shaping has enabled control of light propagation inside linear media to focus and image through scattering objects. In particular, light propagation in multimode fibers comprises complex intermodal interactions and rich spatiotemporal dynamics. Control of physical phenomena in multimode fibers and its applications is in its infancy, opening opportunities to take advantage of complex mode interactions. Various embodiments of the present technology provide wave-front shaping for controlling nonlinear phenomena in multimode fibers. Using a spatial light modulator at the fiber's input and a genetic algorithm optimization, some embodiments control a highly nonlinear stimulated Raman scattering cascade and its interplay with four wave mixing via a flexible implicit control on the superposition of modes that are coupled into the fiber.

Abstract: Recent remarkable progress in wave-front shaping has enabled control of light propagation inside linear media to focus and image through scattering objects. In particular, light propagation in multimode fibers comprises complex intermodal interactions and rich spatiotemporal dynamics. Control of physical phenomena in multimode fibers and its applications is in its infancy, opening opportunities to take advantage of complex mode interactions. Various embodiments of the present technology provide wave-front shaping for controlling nonlinear phenomena in multimode fibers. Using a spatial light modulator at the fiber's input and a genetic algorithm optimization, some embodiments control a highly nonlinear stimulated Raman scattering cascade and its interplay with four wave mixing via a flexible implicit control on the superposition of modes that are coupled into the fiber.

Abstract: A method of microscopy is disclosed. The method comprises directing a pulse of a pump optical beam to form an optical spot on a substance and measuring changes in a temperature-dependent or photo-excited property of the substance. The method further comprises analyzing the measured changes to distinguish between information pertaining to the property at a portion of the spot, and information pertaining to the property at other portions of the spot. A largest diameter of the portion of the spot is optionally and preferably less than a central wavelength of the pump optical beam.

Abstract: A method of microscopy is disclosed. The method comprises directing a pulse of a pump optical beam to form an optical spot on a substance and measuring changes in a temperature-dependent or photo-excited property of the substance. The method further comprises analyzing the measured changes to distinguish between information pertaining to the property at a portion of the spot, and information pertaining to the property at other portions of the spot. A largest diameter of the portion of the spot is optionally and preferably less than a central wavelength of the pump optical beam.