Compared with single-focus optical-resolution photoacoustic microscopy (OR-PAM), multifocal OR-PAM utilizes both multifocal optical illumination and an ultrasonic array transducer, significantly increasing the imaging speed. A reflection-mode multifocal OR-PAM system based on a microlens array that provides multiple foci as well as an ultrasonic array transducer that receives the excited photoa...

The cover illustrates a structured optical field, dubbed flower-shaped vortex array by Xinzhong Li and co-workers in article number 2000575. inner layer uses clock to represent the phase change, hour hand represents of even IG beam, minute odd beam. outer is specific example an which keeps beam unchanged, changes As difference between mode increases, field rotates gradually.

The theoretical foundations of an optical array receiver consisting of relatively small telescopes are developed and analyzed. It is shown that optical array receivers can be designed to perform as well as a large single-aperture receiver on the ground, while enjoying significant advantages in terms of operational reliability, ease of future expansion to achieve greater capacity, and further ad...

Transition of surface-plasmon resonance from out-of-plane photonic crystal effect is observed in a semiconductor array of subwavelength holes by optical pump-terahertz probe measurements. The dielectric properties of the photoexcited array are essentially altered by the intense optical excitation due to photogenerated free carriers. As a result, the array becomes metallic and favors the couplin...

Optical antennas are key elements in quantum optics emitting and sensing, and behave wide range applications in optical domain. However, integration of optical antenna radiating orbital angular momentum is still a challenge in nano-scale. We theoretically demonstrate a sub-wavelength phased optical antenna array, which manipulates the distribution of the orbital angular momentum in the near fie...

An optical waveguide structure, which increases the far field radiation angle two times than that of conventional fiber, is designed and analyzed for the research of optical phased array. The structure improves the scanning scope of the optical fiber phased array effectively through designing the shape and the refractive index profile of the single mode fiber. Far field characteristic of this s...

We demonstrate the design of optical phased arrays that emit 3D holograms. The design concept utilizes back propagation of desired image planes superimposed at the phased array. Improvements are shown utilizing random curved phase fronts. OCIS codes: (110.5100) Phase-array imaging systems; (090.2890) Holographic optical elements.

A noncoherent optical vector-matrix multiplier using a linear LED source array and a linear P-I-N photodiode detector array has been combined with a 1-D adder in a feedback loop. The resultant iterative optical processor and its use in solving simultaneous linear equations are described. Operation on complex data is provided by a novel color-multiplexing system.

| The design of a 16-aperture receive telescope array demonstrator for optical space communications is presented. Preliminary experimental results and computer simulations show that a telescope array with such dimensions and performance could be used as a receive terminal in a coherent optical interorbit link.

This paper presents two algorithms for mutual exclusion on optical bus architectures including the folded one-dimensional bus, the one-dimensional array with pipeleined buses (1D APPB), and the twodimensional array with pipelined buses (2D APPB). The rst algorithm guarantees mutual exclusion, while the second guarantees both mutual exclusion and fairness. Both algorithms exploit the predictabil...