Publications by authors named "Hai-Yu Nie"
A diode-pumped Kerr-lens mode-locked laser generating 25 fs pulses at 1080 nm is demonstrated with an Yb-doped compositional mixed calcium aluminate crystal. The Yb:Ca(Gd,Y)AlO laser, which operates at a repetition rate of 65.6 MHz via soft-aperture Kerr-lens mode-locking, is pumped by a spatially single-mode, fiber-coupled diode laser.
View Article and Find Full Text PDFWe report on the continuous-wave (CW) and, for what we believe to be the first time, passively mode-locked (ML) laser operation of an Yb-doped YSr(PO) crystal. Utilizing a 976-nm spatially single-mode, fiber-coupled laser diode as pump source, the Yb:YSr(PO) laser delivers a maximum CW output power of 333 mW at 1045.8 nm with an optical efficiency of 55.
View Article and Find Full Text PDFArticle Synopsis
- A new mixed crystal, Yb:Ca(Gd,Y)AlO, has been developed and tested for its growth and laser capabilities, showing promising results for both continuous-wave and mode-locked operations.
- The crystal demonstrated a maximum continuous-wave output power of 347 mW with a high slope efficiency of 48.9%, and its emission wavelength can be tuned over a wide range of 90 nm.
- In mode-locked operation, the crystal produced soliton pulses as short as 35 femtoseconds at a wavelength of 1059.8 nm, achieving an average output power of 51 mW and the potential for higher power with slightly longer pulse durations.
Objective: To compare the cytotoxicity and DNA strand breakage induced by multi-walled carbon nanotubes (MWCNTs) with different lengths and different surface modifications in human alveolar type II cells (A549 cells).
Methods: Two different lengths (5-15 μm, 350-700 nm) of MWCNTs and three different kinds of surface modified MWCNTs (COOH-MWCNTs, NH2-MWCNTs, and Tau-MWCNTs) were used in the experiments. The short MWCNTs were used as pristine MWCNTs to compare with the 3 surface modified MWCNTs.
[Effect of titanium dioxide nanoparticles on hemogram in rats with gastric ulcer].
Zhonghua Yu Fang Yi Xue Za Zhi
August 2012
Article Synopsis
- The study aimed to investigate how titanium dioxide (TiO₂) nanoparticles affect blood parameters in rats with induced gastric ulcers.
- Researchers created a gastric ulcer model in 24 male rats and administered different doses of TiO₂ nanoparticles to assess their impact on blood tests over 30 days.
- Results showed significant increases in various blood counts, particularly at the highest dose of 200 mg/kg, indicating that TiO₂ nanoparticles may influence hematological parameters in this experimental setup.
[The cytotoxicity and expression changes of endoplasmic reticulum related genes induced by MWCNTs with different surface modifications].
Beijing Da Xue Xue Bao Yi Xue Ban
June 2011
Objective: To compare the cytotoxicity of RAW264.7 cells induced by two types of multi-walled carbon nanotubes (MWCNTs) with different surface modifications (MWCNTs modified by taurine and MWCNTs treated by acid), and explore the role of endoplasmic reticulum (ER) in MWCNTs-induced apoptosis.
Methods: RAW264.
[Two types of MWNTs with different surface modifications induce differential expression of proteins in RAW264.7 cells].
Beijing Da Xue Xue Bao Yi Xue Ban
June 2010
Objective: To compare the different expression of protein in RAW264.7 macrophage cells induced by two types of MWNTs (multi-walled carbon nanotubes) with different surface modifications (acid-treated MWNTs and tau-MWNTs modified by taurine).
Methods: Treating cells with both types of MWNTs in 20 mg/L and 24 h, with a blank-control group set.