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Chin. Opt. Lett.
Research Highlights
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Actively Q-switched ring Tm-doped fiber laser with free space structure

We report a cladding-pumped actively Q-switched ring Tm-doped fiber laser (TDFL). This laser is Q-switched by a free space acousto-optic modulator. A pulse energy up to 150 μJ with a pulse width of 207 ns at a repetition rate of 100 Hz is achieved for a cavity optical length of 6.68 m. The pulse amplitude’s stability at this repetition rate is better than 95%. To the best of our knowledge, this is...
Long-term in vivo monitoring of injury induced brain regeneration of the adult zebrafish by using spectral domain optical coherence tomography

Brain regenerative studies require precise visualization of the morphological structures. However, few imaging methods can effectively detect the adult zebrafish brain in real time with high resolution and good penetration depth. Long-term in vivo monitoring of brain injuries and brain regeneration on adult zebrafish is achieved in this study by using 1325 nm spectral-domain optical coherence tomo...
Long-range laser ranging using superconducting nanowire single-photon detectors

We demonstrate laser-ranging results for non-cooperative targets at ranges of 237 m and 19 km using superconducting nanowire single-photon detectors (SSPD). We upgrade the kilohertz rate laser-ranging system with a newly developed SSPD module, and the equivalent detection diameter is enlarged to 50 μm with a fiber and micro-lenses. Both retroreflectors and non-cooperative surfaces of aluminum foil...
Application of mobile vehicle lidar for urban air pollution monitoring

  A mobile vehicle lidar system has been developed and applied to detect urban air quality. On September 21 and 22, 2015, particulate matter observation with mobile vehicle lidar was carried out in the Binhai New Area of Tianjin. Combined with the latitude and longitude information acquired by a GPS, the three-dimensional distribution of the aerosol extinction coefficient was presented in the expe...
Announcements
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Chinese Optics Letters New Executive Editor-in-Chief Announcement [23/09/2016]

Chinese Laser Press is privileged to announce the appointment of new Executive Editor-in-Chief David Hagan for one subordinate journal of its publications,Chinese Optics Letters (COL). Dr. Hagan is Professor of Optics a...
COL Cover Story: Actively Q-switched ring Tm-doped fiber laser with free space structure [18/09/2016]

  Measurement accuracy is one of the most important indexes to estimate the capability of LIDAR systems. For Doppler LIDAR, the emission source with a proper long pulse width is beneficial to measurement accuracy. The pulse width is ...
Special Issue for the 50th Anniversary of the Invention of Optical Fiber Communications [02/08/2016]

In 1966, while working at Standard Telephones and Cables, Dr. Charles K. Kao and his co-author published the foundational paper on optical fiber communication - "Dielectric-fibre surface waveguides for optical frequencies",...
COL Cover Story: Long-Term In Vivo Monitoring of Injury-Induced Brain Regeneration of Adult Zebrafish Using Spectral Domain Optical Coherence Tomography [22/07/2016]

  The zebrafish, as a model of vertebrate biology, is widely recognized as an excellent system for exploring brain regeneration. To date, few neuroimaging modalities have been able to effectively and noninvasively visualize the struc...
Call for Papers Special Issue on Complex Optical Fields in Chinese Optics Letters (COL) [14/07/2016]

The Chinese Optics Letters (COL) invites original manuscript submissions for a Special Issue on Complex Optical Fields to be published in March 2017. Recently there is an increasing interest in tailored optical fields with complex am...
COL Cover Story: A new technique for space debris laser ranging [21/06/2016]

  Laser ranging is one of the most accurate technologies for the measurement of objects in space and has been applied successfully to areas such as satellite determination, low Earth Orbit space debris surveillance, and 3D laser imag...
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