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Chin. Opt. Lett.
Research Highlights
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20 Mbps wireless communication demonstration using terahertz quantum devices

A wireless terahertz (THz) communication link is demonstrated, in which a THz quantum cascade laser and a THz quantum-well photo-detector (QWP) serve as the emitter and receiver, respectively. With the help of the well-matched THz QWP, the optical collection efficiency has greatly been improved. A data signal transmitted over 2.2 m with a low bit error rate (<=1 \times 10-8) and data rate as hi...
Quantum-orbit theory of low-energy above-threshold ionization on and off axis

Intense-laser-induced above-threshold ionization of a bound electron into continuum states with low energy is investigated in the context of the strong-field approximation that allows for one act of rescattering of the revisiting electron. The quantum orbits for forward and backward scattering are evaluated and generalized to arbitrary scattering angles. The velocity map of the liberated electron ...
Fiber-based radio frequency dissemination for branching networks with passive phase-noise cancelation

  We demonstrate a new fiber-based radio frequency (RF) dissemination scheme suitable for a star-shaped branching network. Without any phase controls on the RF signals or the use of active feedback-locking components, the highly stable reference frequency signal can be delivered to several remote sites simultaneously and independently. The relative frequency stabilities of 6 \times 10-15/s and 7 \...
Novel calibration optical path of cryogenic radiometer

  We introduce a novel calibration optical path of the cryogenic radiometer, which can avoid the repeated dismounting measurement and eliminate the negative influence of Brewster window effect on calibration result. The novel calibration optical path is used to calibrate the absolute spectral responsivity of the standard transfer detector at 633 nm, the results of which are compared with the ones ...
Announcements
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COL Cover story: 20 Mbit/s wireless communication demonstration using terahertz quantum devices [29/07/2015]

  Terahertz communication (0.1~10 THz) has attracted much attention due to the high carrier frequency and large bandwidth over 100 Gbps. At present, most of the research work is focused on the frequency of 100 ~ 600 GHz, some has mad...
Call for Papers: Joint Feature Issues on Digital Holography and 3-D Imaging in Applied Optics and Chinese Optics Letters [22/07/2015]

Call for Papers: Joint Feature Issues on Digital Holography and 3-D Imaging in Applied Optics and Chinese Optics Letters Submission Opens: 1 August 2015 Submission Deadline: 1 September 2015   The OS...
COL Cover Story: Forward and backward scattering should not be ignored in above-threshold ionization [09/07/2015]

  Above-threshold ionization (ATI), that is, ionization of an atom or molecule by an intense laser field, leads to an intricate electron spectrum that corresponds to a very large number of electron-photon interactions. Alternatively,...
COL Cover Story:New Fiber-based radio frequency dissemination scheme for branching networks [18/06/2015]

  Time is one of the earliest known fundamental physical quantities in nature. To maintain time synchronization between different places and establish unified time and frequency standards concern all aspects of the human production a...
COL Cover Story:Novel optical scheme based on cryogenic radiometer for successive calibration [22/05/2015]

  High accuracy of radiometric calibration is a prerequisite and guarantee for quantitative remote sensing. The traditional calibration method based on radiation source could not meet the requirement for further application of remote...
COL cover story: Novel Evaluation method of surface figure for large aperture reflecting mirror [17/04/2015]

  The thirty meter telescope (TMT) Project is an international partnership among USA, Canada, Japan, India, China as well as other top R&D nations. The sensitivity and the spatial resolution of telescope will be improved to by fa...
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