2017-12-15 Welcome guest,  Sign In  |  Sign Up
Chin. Opt. Lett.
Research Highlights
[+More]
High power generation of adaptive laser beams in a Nd:YVO4 MOPA system

We report efficient power scaling of the laser output with an adaptive beam profile from an Nd:YAG dual-cavitymaster oscillator using a three-stage end-pumped Nd:YVO4 amplifier. We succeed in the fast switching of anexcited laser mode by modulating an acousto-optic modulator loss in a dual-cavity master oscillator, therebyachieving temporal modulation of the output beam profile. The outputs from t...
Metamaterials-based terahertz sensor for quick diagnosis of early lung cancer

We experimentally demonstrate a metamaterials (MMs)-based terahertz (THz) sensor to quickly distinguish the cancer tissues from normal tissues. The MMs-based THz sensor has two strong resonance absorption peaks at about 0.706 and 1.14 THz, respectively. When the sensor is covered with cancer tissues, the redshifts at about 0.706 and 1.14 THz are 31 and 19 GHz, respectively. However, if normal tiss...
Compressed sensing in synthetic aperture photoacoustic tomography based on a linear array ultrasound transducer

Photoacoustic tomography (PAT) has the unique capability of visualizing optical absorption inside several centimeters-deep biological tissue with a high spatial resolution. However, single linear-array transducer-based PAT suffers from the limited-view challenge, and thus the synthetic aperture configuration is designed that still requires multichannel data acquisition hardware. Herein, a feasible...
Influence of laser contrast on high-order harmonic generation from solid-density plasma surfaces

The influence of laser temporal contrast on high-order harmonic generation from intense laser interactions with solid-density plasma surfaces is experimentally studied. A switchable plasma mirror system is set up to improve the contrast by two orders of magnitude at 10 ps prior to the main peak. By using the plasma mirror and tuning the prepulse, the dependence of high-order harmonic generation on...
Announcements
[+More]
Cover Story: A dual-cavity master-oscillator power-amplifier (MOPA) offers laser beams with high power and a time-dependent tailored intensity profile [27/11/2017]

Tailoring laser beam profiles is very attractive in material processingapplications since the intensity distribution at the work piece dictates theresultant pattern of the induced damaged zone, and the effects on the zonesurrounding ...
Cover Story: Novel method for diagnosis of early-stage lung cancer: using metamaterials THz sensors [17/10/2017]

Currently, lung cancer has become one of the leading causes of cancerdeath. In many cases, the lung cancer has already spread beyond the originalsite by the time the patients have symptoms and seek medical attention. Themain reason i...
COL Cover Story: Compressed sensing in synthetic aperture photoacoustic tomography based on a linear array ultrasound transducer [09/10/2017]

Photoacoustictomography (PAT) is a noninvasive and non-ionizing hybrid biomedical imagingmodality, which has the unique capability of visualizing optical absorptioninside the several centimeters deep biological tissue with high acous...
Feature Issue Announcement:Advances in Metasurfaces [31/08/2017]

Chinese OpticsLetters (COL) invites original manuscriptsubmissions for a Special Issue on Advancesin Metasurfaces to be publishedin May 2018. Metasurface refers to a type of artificial thin film materialswith sub-wavelength featu...
COL Cover Story: Plasma Mirror: An Effective System for High-order Harmonic Generation [08/08/2017]

Generation of light pulses with shorter duration for diagnosing and controlling the ultrafast processes in microcosm has been a subject of strong scientific interest. Femtosecond laser pulses can be extensively produced by the self-m...
COL Cover Story: A new scheme of generating intense keV isolated attosecond pulses [30/06/2017]

The generation of intense isolated attosecond pulses (IAPs) covering the keV regime has become a hot topic at present due to their practical applications such as biological imaging, X-ray diffraction, attosecond pump-probe dynamics. ...
Copyright©2014 Chinese Optics Letters 沪ICP备05015387