Nonlinear Optics
Effect of concentration on the formation time of diffraction rings in spatial self-phase modulation
Chinese Optics Letters
  • Sep. 17, 2021
  • Vol.20, Issue 1 (2022)
Lasers, Optical Amplifiers, and Laser Optics
Coherent dissipative soliton intermittency in ultrafast fiber lasers
Yueqing Du, Chao Zeng, Zhiwen He, Qun Gao, and Dong Mao
Chinese Optics Letters
  • Sep. 17, 2021
  • Vol.20, Issue 1 (2022)
Spectroscopy
Influence of a dielectric decoupling layer on the local electric field and molecular spectroscopy in plasmonic nanocavities: a numerical study
Chinese Optics Letters
  • Sep. 17, 2021
  • Vol.19, Issue 12 (2021)
Biophotonics
Photoacoustic/ultrasound dual modality imaging aided by acoustic reflectors
Guangjie Zhang, Yu Sun, Xing Long, Rui Zhang, Meng Yang, and Changhui Li
Chinese Optics Letters
  • Sep. 17, 2021
  • Vol.19, Issue 12 (2021)
Optical Materials
Ultra-fast and low-cost fabrication of transparent paper
Lulin Wei, Jie Li, Haohao Wang, Shuhong Nie, Wenming Su, Dafang Huang, and Mingwei Zhu
Chinese Optics Letters
  • Sep. 17, 2021
  • Vol.19, Issue 12 (2021)
COL Highlights
The self-mixing interferometer (SMI) is a sort of optical radar capable of detecting extremely weak optical returns from a remotely located target and measuring the amplitude and phase of it. Different from the traditional radar based on launching a pulse to the target, the SMI uses a continuous coherent beam and operates as a coherent detector. Thanks to this feature, SMI has an unparalleled sensitivity to very small returns (down to 10-8 of the launched power) and can measure the phase – that is the optical pathlength down the target and back-with resolution of milliradian, that translates into optical pathlength attaining fractions of nanometers.
Chinese Optics Letters
  • Sep. 16, 2021
  • Vol.19, Issue 9 (2021)
On the Cover
Optical isolators are nonreciprocal devices that allow light to pass in one direction but block light in the opposite direction. They are typically used to prevent unwanted back reflections into optical oscillators such as lasers, and to suppress crosstalk between different optical devices. Nonreciprocal optical elements such as circulators and isolators are essential for the realization of integrated optical circuits. The design of nonreciprocal components requires breaking the time reversal symmetry. This can be achieved through the use of nonlinear materials, materials with time-dependent properties, and magneto-optical materials. However, since the magneto-optical response of natural materials is weak at optical wavelengths, designing nonreciprocal devices that are based on magneto-optical materials results in bulky structures that are much larger than the wavelength. The advent of silicon photonics and photonic crystals has reduced the size of nonreciprocal optical components down to wavelength scale.
Chinese Optics Letters
  • Aug. 31, 2021
  • Vol.19, Issue 8 (2021)
Editors' Picks
The research group led by Prof. Jingliang He, Baitao Zhang from Shandong University co-operated with the group of Prof. Haiping Xia from Ningbo University, have designed and fabricated high-quality Er,Pr:YLF crystal and obtained high-power and high-efficiency 2.7 µm mid-infrared (MIR) radiation. This research result was published in Chinese Optics Letters, Vol. 19, No. 8 (Haiping Xia, Jingliang He, and Baitao Zhang et al, Spectroscopic and laser properties of Er3+, Pr3+ co-doped LiYF4 crystal).
Chinese Optics Letters
  • Aug. 26, 2021
  • Vol.19, Issue 8 (2021)
On the Cover
Ultrafast laser has the advantages of flexible design, short pulse width and high peak power, which has a very broad application prospect in the fields of micro-/nano-processing, biomedicine, national defense and military. In order to achieve ultrafast laser output, mode-locking technology is generally needed. To this end, researchers have proposed a variety of schemes. In 2003, Karen Intrachat and J. Nathan Kutz, Department of Applied Mathematics of University of Washington in USA, predicted theoretically that long-period fiber grating has pulse-shaping function, which can be used to construct ultrafast fiber lasers. In 2008, Abdullah S. Karar, Tom Smy and Alan L. Steele, department of electronics of Carlton University in Canada, conducted theoretical research on ultrafast fiber lasers with long-period fiber gratings. They found that this kind of laser can produce a variety of soliton pulses. However, there is a lack of experimental research on (ultra)-long-period fiber gratings as ultrafast optical devices by far.
Chinese Optics Letters
  • Aug. 12, 2021
  • Vol.19, Issue 7 (2021)