Silicon-nitride (SiN) microresonators have become versatile tools of linear, nonlinear, and quantum optics. In this talk, we will describe the design of SiN microresonators with adjustable dispersion and Q-factors, and will also discuss the experiments on sensing biological neurotransmitters using SiN microrings.
We describe the design of a novel microfluidic label-free optical biosensor which is able to detect a liquid analyte by measuring the change in the refractive index. A sensitivity greater than 1200 nm/RIU is achieved by this metamaterial / liquid-core waveguide based sensor.
Based on direct phase noise compensation utilizing an external phase modulator, we reduce the laser spectral width from 450 kHz to 60 kHz and detect directly 5 G-symbol/s binary and quaternary phase shift keying signals without digital signal processing electronics.
A structured thin film with widely variable long-wave emissivity and insignificant change to its visible reflectance is proposed and demonstrated theoretically. An application is dynamic Identification Friend or Foe (IFF) panel viewable at LWIR but optically invisible.
In this paper, we present results on high power photodetector and DFB laser technology, developed for RF photonic link applications. Lasers with operation at 1280nm and 1550nm shows >250mW laser output power with low RIN and 22 GHz photodetectors shows 25 dBm output power.