Non-destructive Fiber Sensing System with AI Prediction for Root Phenotyping
The quantitative evaluation of plant organs in a non-destructive and continuous fashion is the technological bottleneck to meet the food, fuel, and fiber needs for the 10 billion people on earth by 2050. Quantifying crop root architecture paves promising ways …
View MoreTwining Plant Inspired Soft Gripper with a Fiber Optic Twisting Sensor
The field of soft robotics has been significantly advanced with the recent developments of pneumatic techniques, soft materials, and high-precision motion control. While comprehensive motions can be achieved by sophisticated soft robots, multiple coordinated pneumatic controls are usually required to …
View MoreMarine Hatchetfish Camouflage Strategies for RF Steganography
Camouflage is a strategy that animals utilize for concealment in their habitat, making themselves invisible to their predators and preys. In RF systems, steganography or stealth transmission is the camouflage of information – a technology of hiding and transmitting secret …
View MoreToy Box Optics
Optical technologies can be found in many aspects of our daily lives. We have developed three experiments using items that can be found in a toy box or around the house to demonstrate and explain optical concepts. Videos of the …
View MoreShape-Forming Donut-Shaped Soft Gripper
In this work, the design and demonstration of a shape-forming soft gripper with a donut body is explored. The vacuum-powered donut soft gripper has a 2.50 mm thick silicone membrane and is filled with 7.50 g of polyester fiberfill to …
View MoreAdaptive RF Spectral Shaping
The radio frequency spectral shaper is an essential component in emerging multi-service mobile communications, multiband satellite and radar systems, and future 5G/6G radio frequency systems for equalizing spectral unevenness, removing out-of-band noise and interference, and manipulating multi-band signal simultaneously. While …
View MorePhotonics + Neuron: Spike-Timing-dependent Plasticity
The neurobiological learning algorithm, spike-timing-dependent plasticity (STDP), is demonstrated in a simple photonic system using the cooperative nonlinear effects of cross gain modulation and nonlinear polarization rotation, and supervised and unsupervised learning using photonic neuron principles are examined. An STDP-based …
View MoreStretchable Fiber Optic Sensing System
A fiber-Bragg-grating-(FBG)-based sensor is a very popular fiber optic sensor due to its simplicity, mature fabrication technology, and sensitivity to a number of physical stimuli. However, due to the stiff nature of optical fiber, it is impossible to heavily stretch …
View MoreBio-inspired Jamming Avoidance Response
Biomimetic photonics extract the good design of nature and mimic it with photonics. The weakly electric fish genus, Eigenmannia, has a unique neural algorithm – jamming avoidance response, to facilitate their survival in the deep dark ocean, by automatically adjusts …
View MoreTunable and Reconfigurable Microwave Photonic Filters with Large Nunber of Passbands
Multiband RF filters with independently controllable passbands are an essential component in dynamic multiband RF communications. Unfortunately, even a fixed multiband RF filter without the capability to adjust the passband properties individually is very difficult to achieve using either RF …
View MoreWideband Co-site Interference Cancellation based on Hybrid Electrical and Optical Techniques
A wideband co-site co-channel interference cancellation system (ICS), based on hybrid electrical and optical techniques, is proposed and is experimentally demonstrated. The demonstrated cancellation system subtracts the in-band wideband interfering signal from the received signal, such that the weak signal …
View MoreSpiral-structured Fiber Bragg Grating for Contact Force Sensing in Catheter
A high-sensitivity fiber Bragg grating (FBG) force sensor based on direct optical power measurement is presented. The approach utilizes a novel structure where the FBG is mounted on a thin tube-like fixture spirally. Contact force measurement is achieved through direct …
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