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Chin. Opt. Lett.
Research Highlights
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550 MHz carbon nanotube mode-locked femtosecond Cr:YAG laser

We demonstrate a femtosecond Cr:YAG laser mode-locked by a carbon nanotube saturable absorber mirror (CNT-SAM) at a repetition rate of 550 MHz. By employing the CNT-SAM, which exhibits a modulation depth of 0.51% and a saturation fluence of 28 μJ/cm2 at 1.5 μm, we achieved a compact bulk Cr:YAG laser with self-starting mode-locked operation near 1.5 μm, delivering an average output power of up to ...
50 GHz optical true time delay beamforming in hybrid optical/mm-wave access networks with multi-core optical fiber distribution

We propose and experimentally validate an optical true time delay beamforming scheme with straightforwardintegration into hybrid optical/millimeter (mm)-wave access networks. In the proposed approach, the most complexfunctions, including the beamforming network, are implemented in a central office, reducing the complexityand cost of remote antenna units. Different cores in a multi-core fiber are u...
Photoacoustic characteristics of lipid-rich plaques under ultra-low temperature and formaldehyde treatment

Photoacoustic imaging (PAI) has been used to characterize the spatial and quantitative features of lipid-richatherosclerotic plaques with high sensitivity and specificity. In this Letter, we first validate that the ultra-lowtemperature and formaldehyde treatment have no effect on photoacoustic characteristics of the artery samples.Comparative experiments between the PAI and histological results de...
Robust fiber-based frequency synchronization system immune to strong temperature fluctuation

In order to make the fiber-based frequency synchronization system suitable for the use of large-scale scientific and engineering projects in which the ambient temperature of the fiber links change dramatically, we design a non-harmonic frequency dissemination system immune to strong temperature fluctuation. After the lab tests, in which the ambient temperature of the fiber fluctuates 40°C/day and ...
Announcements
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COL Cover Story:Carbon nanotube mode-locked Cr:YAG laser: High Efficient solution for high-repetition-rate femtosecond source near 1.5 μm [21/06/2018]

The femtosecond (fs) laser source with high average powers and high repetition rate (above500 MHz) is very attractive for the applications like nonlinear spectroscopyand material processing. The femtosecond laser source with high pul...
Cover story: 50 GHz optical true time delay beamforming in hybrid optical/mm-wave access networks with multi-core optical fiber distribution [11/06/2018]

The tremendous growth of worldwidedata traffic over the past years means that the future access network architectures will be revised.The flexibility of wireless links, compared with wired ones, makes them moreadequate and cost effic...
Cover story: Photoacoustic characteristics of lipid-rich plaques under ultra-low temperature and formaldehyde treatment [20/03/2018]

Photoacoustic characteristics oflipid-rich plaques under ultra-low temperature and formaldehyde treatment Cardiovascular diseases are the number one cause of deathworldwide, amongwhich, atherosclerosis is the fundamental pathology. ...
Cover story: A robust fiber-based frequency synchronization system immune to strong temperature fluctuation [26/12/2017]

Square KilometreArray (SKA) is an international large-scale scientific engineering project thatinvolves multiple countries, aiming at building the largest and most sensitive radiotelescope in theworld. SKA will be constructed in the ...
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...
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