High-Sensitivity Methane Sensing Using Unbalanced Nonlinear Interferometry and a CMOS Camera
A high-sensitivity, rapid, and low-cost method for methane sensing based on a nonlinear interferometer that utilizes signal photons generated by stimulated parametric down-conversion, enabling the use of a silicon detector to capture high-precision methane absorption spectra in the mid-infrared region.
Dynamically Stable All-Optical Trap for Levitating Nanoparticles
A rotating optical saddle beam can generate a dynamically stable equilibrium point capable of trapping nanoparticles in high vacuum, enabling new possibilities for levitated optomechanics experiments.
Design, Fabrication, and Testing of Radiation-Resistant Diamond Axicons for Advanced X-ray Microscopy
The development of a refractive diamond axicon that can efficiently transform X-ray beams into ring-shaped profiles, addressing the limitations of polymer-based axicons in high-radiation synchrotron environments.
Design of a Custom Wide-Band Camera Lens for the MISTRAL Imager-Spectrograph
A custom-designed wide-band camera lens is proposed to replace the commercial lenses currently used in the MISTRAL imager-spectrograph, providing improved throughput, resolution, and spectral coverage.
Highly Efficient, Broadly-Tunable Megawatt Pulse Source for Deep-Tissue Multiphoton Microscopy Based on Self-Phase Modulation in Argon-Filled Hollow-Core Fiber
A fiber-based source of femtosecond pulses with multi-megawatt peak power, tunable from 850 nm to 1700 nm, is developed using self-phase modulation in argon-filled hollow-core fiber. This approach enables efficient generation of high-energy ultrashort pulses across a wide wavelength range for deep-tissue multiphoton imaging.
Continuous Phase Modulation Technology for Precise Wavelength Control and High Coupling Efficiency in Laser Arrays
A novel continuous phase modulation technique for laser arrays enables precise wavelength control, high coupling efficiency, and improved tolerance to fabrication errors.
Metal-Mesh Linear Variable Bandpass Filters for Far-Infrared Wavelengths
Novel far-infrared linear variable bandpass filters consisting of metal-mesh filters with cross-slots of varying sizes on a silicon substrate have been designed, fabricated, and measured to enable hyperspectral imaging for future far-infrared astronomical observatories.
Experimental Measurement of Transverse Spin Dynamics in the Nonparaxial Focal Region of a High-Numerical Aperture Lens
The authors experimentally measured the polarization helicity-dependent and helicity-independent transverse spin dynamics in the nonparaxial focal region of a high-numerical aperture lens by tracking the C-point polarization singularities in the retroreflected output beam.
Building and Precisely Aligning a 10-Plane Programmable Light Converter Using a Single Spatial Light Modulator
A detailed step-by-step guide for building and precisely aligning a 10-plane programmable light converter using a single spatial light modulator and standard optical components, enabling full control over multiple spatial modes of light.
Frequency-Shifted Laser Feedback Interferometry in Non-Planar Ring Oscillators: A Novel Approach for High-Precision Vibration Measurements
A new type of laser feedback interferometry based on a non-planar ring oscillator (NPRO) laser system is demonstrated, which can achieve frequency-shifted interferometry without using external acousto-optic modulators.
