Session Index

A novel thermal microscopy technique with sub-micron spatial resolution and sub-degree temperature resolution on integrated circuits (IC) was presented using modified two-photon fluorescence (TPF) imaging. Results show that TPF imaging is able to detect the thermal dynamics and various types of thermally-induced IC defects.

 

The electro-optically-tunable lithium niobate microdisk resonators with high tuning efficiency are presented. The electro-optical tuning is achieved by using the electro-optic coefficients r22 and r13. The electrode structure is designed to avoid the counteraction of two electro-optic index changes such that the electro-optic tuning rate is as high as 15.08pm/V.

 

We investigated the polarization properties of stimulated emission from ten-period ZnO/ZnMgO MQWs, produced by pulsed laser deposition, on a c-plane sapphire substrate. Through the side pump of a Q-switched laser with the intensity about 1.79 MW/cm2, we demonstrated the linear polarized SE from MQWs with degree of polarization about 0.95.

 

A pulsed-power system with an expected output peak current of ~500 kA will be used to drive a capillary z-pinch filled with argon gas. The plasma in the capillary heated by the pinch acts as a pumped media. Soft x-ray lasing can occur from the hot plasma.

 

We report parametric amplification in a KTP off-axis THz parametric oscillator seeded by the signal from a KTP parametric generator. We measured a peak power of 21 W at 5.7 THz at the output with 13-mJ pump energy at 1064 nm and sub-microjoule signal energy at 1086 nm.

 

The output power and bandwidth of an optical parametric chirp pulse amplifier is sensitive to the critical temporal and spatial overlap between seed and pump pulses. We demonstrate a simple feedback loop that can substantially stabilize the power and bandwidth for real applications.

 

Four coherent phonon types (A₁g¹、A₁g²、Eg²、CAP) are observed in transmission pump-probe spectroscopy at low temperature (78K、90K). Especially, lifetime of around 2.87ps for Eg² phonon mode is observed for the first time. Additionally, A₁g¹ phonon oscillation in low temperature (78K~190K) reflectivity pump-probe spectroscopy is investigated.

 

We demonstrate surface plasmon nanolasers that feature a ZnO-nanowire placed on Al-grating surface with a nano-trench cavity. The designed near-ultraviolet nanolaser sensors have significant sensing performances, revealing a high sensitivity of 249 nm/RIU and high resolution, with a figure of merit of 1132, at the resonant wavelength of 373 nm.

 

We present the study of output modes characteristics of a semiconductor circular ring laser diode with two Y-junction couplers. It shows that output modes of the laser diode were sequentially excited from the circular ring mode, the soliton and linear waveguide mode to the parametric amplified mode.

 

We report a continuous-wave 810-nm LED pumped Nd:YAG laser with thermal isolated and light-guided pump scheme. At 14-W pump power, we generated the multi-mode laser is 370-mW and the single-mode laser is 248-mW. The multi-mode output corresponding optical efficiency and slope efficiency is 2.6% and 5.5%.

 

Using Impurity-Free Vacancy Diffusion (IFVD) quantum-well-intermixing (QWI), refractive index can be reduced in a patterned region. A periodic refractive index pattern by a pattern QWI has been designed to obtained embedded optical mode in bulk material and also distributed reflection, suitable for regrowth-free DFB laser fabrication.

 

Laser micromachining is applied to the ablation phenomenon of the process after the wet and switch dual-function components. It can be known that the average size of the random ablation holes after laser micromachining in the three regions and the nine regions of the laser light target is 5.85 μm,2.41μm.

 

We present a simple phase detector for demodulating a high-frequency modulation light signal. The detector is made of an I&Q demodulator, an Arduino UNO 3, and a LabVIEW program. By using our phase detector, we can measure the speed of light within a small optical breadboard.

 

In this report, following our research in OPTIC 2017, we analyze six regression model to study the possible causality relationship among DFB/DBR, external cavity, and vertical-cavity surface-emitting lasers, and laser structure factors. And we use practical patents to study the above causality.