2020 AP Editor-in-Chief Choice Award Released
On the Cover: A history of high-power laser research and development in the United Kingdom
On the Cover: Mode division multiplexing: from photonic integration to optical fiber transmission [Invited]
On the Cover: Experimental verification of group non-membership in optical circuits
On the Cover: Optical control of transverse motion of ionization injected electrons in a laser plasma accelerator

The 2020 Advanced Photonics Editor-in-Chief Choice Award has been released recently. In the end, an original research article and a review article were acknowledged to this honor. “Every article published in 2020 deserved this award,” Co-Editor-in-Chief Anatoly Zayats said. “Finally, we decided to recommend these two articles based on the level of attention and recognition they gained from the readers. There is no doubt that they reflect the development trends in the field of optics and photonics.”

The image on the cover of High Power Laser Science and Engineering Volume 9, Issue 2, indicates that many laboratories worldwide began the search for lasers using different materials, operating at different wavelengths. In the UK, academia, industry and the central laboratories took up the challenge from the earliest days to develop these systems for a broad range of applications. The image is based on original research by Colin N. Danson et al. presented in their paper "A history of high-power laser research and development in the United Kingdom", High Power Laser Science and Engineering 9 (2), 02000e18 (2021).

The image on the cover for Chinese Optics Letters Volume 19, Issue 9, indicates that different modes in a few-mode fiber (FMF) can be employed for mode division multiplexing (MDM) to overcome the capacity crunch of optical communications based on the traditional single-mode fiber (SMF). MDM can also be extended to photonic integration for obtaining improved density and efficiency, as well as interconnection capacity.The image is based on original research by Jiangbing Du et al. presented in their paper "Mode division multiplexing: from photonic integration to optical fiber transmission [Invited]", Chinese Optics Letters 19 (9), 091301 (2021).

The image on the cover for Photonics Research Volume 9, Issue 9, experimentally demonstrates the new verification process with a four-element group in an all-optical circuit. The new protocol is validated experimentally by observing a significant completeness-soundness gap between the probabilities of accepting elements in and outside the subgroup.The image is based on original research by Kai Sun et al. presented in their paper "Experimental verification of group non-membership in optical circuits", Photonics Research 9 (9), 09001745 (2021).

The image on the cover of High Power Laser Science and Engineering Volume 9, Issue 1, demonstrate an all-optical method for controlling the transverse motion of an ionization injected electron beam in a laser plasma accelerator by using the transversely asymmetrical plasma wakefield. The laser focus shape can control the distribution of a transversal wakefield. The image is based on original research by Jie Feng et al. presented in their paper "Optical control of transverse motion of ionization injected electrons in a laser plasma accelerator", High Power Laser Science and Engineering 9 (1), 010000e5 (2021).

On the Cover
Overview of refractive index sensors comprising photonic crystal fibers based on the surface plasmon resonance effect
Over the past few decades, optical fibers have been widely applied to telecommunication, imaging, lasers, and sensing. Optical fibers constitute a platform to excite surface plasmon resonance (SPR) when plasmonic materials are coated on the surface of the fiber core, thus satisfying the need for miniaturization and integration. In particular, photonic crystal fiber (PCF) sensors based on SPR (PCF-SPR) have drawn much attention due to the flexibility of their structure. A PCF is essentially a microstructured optical fiber consisting of a silica core surrounded by a periodic lattice of air holes along the length of the fiber. PCFs are regarded as a desirable platform to excite surface plasmon resonance (SPR) because of easy realization of phase matching conditions between the fundamental core mode and the plasmonic mode, which is the most unique advantage over conventional optical fiber SPR sensors.
Chinese Optics Letters
  • Oct. 26, 2021
  • Vol. 19, Issue 10 (2021)
Editors' Picks
Measurement-device-independent quantum key distribution for nonstandalone networks
Loading and transmitting information using photons, quantum key distribution can share random key among users with unconditional security. The security is ensured by the quantum nature of photons and independent with computational complexity where any eavesdropping can be detected and quantified. Quantum key distribution has attracted extensive attention, fiber-based quantum key distribution networks using BB84 protocol has been deployed on a large scale, it takes the first step along the roadmap of Quantum Internet.
Photonics Research
  • Oct. 25, 2021
  • Vol. 9, Issue 10 (2021)
Editors' Picks
Identifying self-trapped excitons in 2D perovskites by Raman spectroscopy
Crystals with a 'soft' lattice are prone to distortion and deformation, which leads a strong excitons-phonons coupling. The strong coupling between the crystal lattice and excitons would lead to the formation of self-trapped excitons (STE), which are one type of bound state excitons. Unlike bound state excitons usually formed by binding to defects, STE can be produced even in a perfect crystal lattice. Since STE are produced by the coupling of excitons and phonons, they can be regarded as bound state excitons in an excited state. Once the excitons recombine, the lattice returns to its original state, and the self-trapped state disappears.
Chinese Optics Letters
  • Oct. 21, 2021
  • Vol. 19, Issue 10 (2021)
News
Special Issue on Inertial Confinement Fusion
Special Issue on Inertial Confinement Fusion
High Power Laser Science and Engineering
  • Oct. 18, 2021
  • Vol. , Issue (2022)
Editors' Picks
Laplace metasurfaces for optical analog computing based on quasi-bound states in the continuum
It is an important research topic how to achieve more powerful computing and image-processing abilities, because the processing of huge information and images is in a great demand. In contrast to conventional electronic computers and quantum computers working in a digital way, optical computing working in an analog way is of great potential for parallel computing with low power consumption and high speed.
Photonics Research
  • Oct. 08, 2021
  • Vol. 9, Issue 9 (2021)
Newest Articles
Use of KDP crystal as a Kerr nonlinear medium for compressing PW laser pulses down to 10 fs

The input pulse of the laser PEARL with energy of 18 J and pulse duration of about 60 fs was compressed to 10 fs after passage through a 4-mm-thick KDP cr

The input pulse of the laser PEARL with energy of 18 J and pulse duration of about 60 fs was compressed to 10 fs after passage through a 4-mm-thick KDP crystal and reflection at two chirped mirrors with sum dispersion of -200 fs2. The experiments were performed for the В-integral values from 5 to 19 without visible damage to the optical elements, which indicates that small-scale self-focusing is not a significant issue. It was shown that, by virtue of the low dispersion of the group velocity, the KDP crystal has some advantages over silica: a larger pulse compression coefficient, especially at a small value of the В-integral (B = 5, …, 9), lower absolute values of chirped mirror dispersion, and also a possibility to control the magnitude of nonlinearity and dispersion by changing crystal orientation.show less

  • Oct.27,2021
  • High Power Laser Science and Engineering,Vol. 9, Issue 4
  • 04000e54 (2021)
High-intensity laser-driven secondary radiation sources using the ZEUS 45 TW laser system at the Institute of Plasma Physics and Lasers of the Hellenic Mediterranean University Research Centre

The rapid development of high-intensity laser-generated particle and photon secondary sources has attracted widespread interest during the last 20 years n

The rapid development of high-intensity laser-generated particle and photon secondary sources has attracted widespread interest during the last 20 years not only due to fundamental science research but also because of the important applications of this developing technology. For instance, the generation of relativistic particle beams, betatron-type coherent X-ray radiation and high harmonic generation have attracted interest from various fields of science and technology owing to their diverse applications in biomedical, material science, energy, space, and security applications. In the field of biomedical applications in particular, laser-driven particle beams as well as laser-driven X-ray sources are a promising field of study. This article looks at the research being performed at the Institute of Plasma Physics and Lasers (IPPL) of the Hellenic Mediterranean University Research Centre. The recent installation of the ZEUS 45 TW laser system developed at IPPL offers unique opportunities for research in laser-driven particle and X-ray sources. This article provides information about the facility and describes initial experiments performed for establishing the baseline platforms for secondary plasma sources.show less

  • Oct.27,2021
  • High Power Laser Science and Engineering,Vol. 9, Issue 4
  • 04000e53 (2021)
In-band intermodulation induced by transient response of erbium-doped fiber amplifier

Transient response of an erbium-doped fiber amplifier (EDFA) is studied in an externally-modulated analog link. Double tones represented as transmitted ra

Transient response of an erbium-doped fiber amplifier (EDFA) is studied in an externally-modulated analog link. Double tones represented as transmitted radio frequency and dither signals are introduced. Extra modulation is generated owing to the EDFA’s transient response caused by a low-frequency dither signal. Therefore, the parasitic modulation is superposed to the output signals and may significantly affect in-band electrical spectra. Analytical and numerical solutions are both given, which agree well with experimental results. This work indicates that a suitable dither signal should be selected to maximize the carrier to intermodulation ratio. In-band spurious free dynamic range is optimized in the meantime.show less

  • Oct.27,2021
  • Chinese Optics Letters,Vol. 20, Issue 1
  • 013901 (2022)
Analysis and suppression of thermal effect of an ultra-stable laser interferometer for space-based gravitational waves detection

In this paper, we present a suppression method for the thermal drift of an ultra-stable laser interferometer. The detailed analysis on the Michelson inter

In this paper, we present a suppression method for the thermal drift of an ultra-stable laser interferometer. The detailed analysis on the Michelson interferometer indicates that the change in optical path length induced by temperature variation can be effectively reduced by choosing proper thickness and/or incident angle of a compensator. Taking the optical bench of the Laser Interferometer Space Antenna Pathfinder as an example, we analyze the optical bench model with a compensator and show that the temperature coefficient of this laser interferometer can be reduced down to 1 pm/K with an incident angle of 0.267828 rad. The method presented in this paper can be used in the design of ultra-stable laser interferometers, especially for space-based gravitational waves detection.show less

  • Oct.27,2021
  • Chinese Optics Letters,Vol. 20, Issue 1
  • 011203 (2022)
Optics Physics Geography

We proposed an aperiodic laser beam distribution, in which the laser beams are placed along Fermat spiral, to suppress the sidelobe power in the coherent beam combining. Owing to the ch

We proposed an aperiodic laser beam distribution, in which the laser beams are placed along Fermat spiral, to suppress the sidelobe power in the coherent beam combining. Owing to the changed distances between two consecutive beams, the condition of the sidelobe suppression are naturally satisfied. The Fermat spiral array were demonstrated to achieved a better sidelobe suppression than the periodic arrays, and the effects of various factors on the sidelobe suppression were analyzed numerically. Experiments were carried out to verify the sidelobe suppression by different Fermat spiral arrays and the results matched well with the simulations.show less

  • Oct.27,2021
  • Chinese Optics Letters,Vol. 20, Issue 2
  • (2022)

Large area and uniform monolayer MoS2 is of great importance for optoelectronic devices but is commonly suffering from rather weak photoluminescence. Here, by engineering the concentrat

Large area and uniform monolayer MoS2 is of great importance for optoelectronic devices but is commonly suffering from rather weak photoluminescence. Here, by engineering the concentration profiles of gaseous chemicals through extra trace amount of water, we demonstrate the uniform dendrite-type growth of monolayers MoS2 unraveled by the spatially resolved fluorescence spectroscopy, which exhibits macroscopic monolayer flakes (up to centimeter scale) with photoluminescence intensity of orders of magnitude higher than conventional CVD monolayers MoS2. Both spectroscopic evidence and theoretical models reveal that the fast-fractal dendrite growth can be ascribed to the extra introduced water sources that generate sufficient aqueous gas around the S-poor regions nearby the central-axis zone, leading to highly efficient Mo sources transport, accelerated S atom corrosion nearby grain edges and/or defect sites, as well as enhanced photoemission intensity. Our results may provide new insight for high throughput fabrication of MoS2 monolayers with high yield photoluminescence efficiency.show less

  • Oct.27,2021
  • Chinese Optics Letters,Vol. 20, Issue 1
  • (2022)

A hundred-watt level spatial mode switchable all-fiber laser is demonstrated based on a master oscillator power amplifier scheme. The performance of the amplifier with two seed lasers,

A hundred-watt level spatial mode switchable all-fiber laser is demonstrated based on a master oscillator power amplifier scheme. The performance of the amplifier with two seed lasers, i.e., with the acoustically induced fiber grating (AIFG) mode converter inside and outside of the seed laser cavity, is investigated. Real-time mode switching with millisecond scale switching time between LP<sub>01</sub> and LP<sub>11</sub> mode while operating in full power (> 100 W) is realized through an AIFG driven by radio frequency modulation. This work could provide a good reference for realizing high-power agile mode switchable fiber lasers for practical applications.show less

  • Oct.27,2021
  • Chinese Optics Letters,Vol. 20, Issue 2
  • (2022)

In this paper, an effective method is proposed to generate specific periodical surface structures. 532nm linearly polarized laser is used to irradiate the silicon with pulse duration of

In this paper, an effective method is proposed to generate specific periodical surface structures. 532nm linearly polarized laser is used to irradiate the silicon with pulse duration of 10ns and repetition frequency of 10 Hz. LIPSS is observed when the fluence is 121 mJ/cm2 and pulses number of 1000 shots. The threshold of fluence for generating LIPSS gradually increases with the decrease of pulses number. In addition, the laser incident angle has a notable effect on the period of LIPSS which varies from 430 nm to 1578 nm as the incident angle ranges from 10° to 60° correspondingly. Besides, the reflectivity is reduced significantly on silicon with LIPSS. show less

  • Oct.27,2021
  • Chinese Optics Letters,Vol. 20, Issue 1
  • (2022)
The 2020 Advanced Photonics Editor-in-Chief Choice Award has been released recently. In the end, an original research article and a review article were acknowledged to this honor. “Every article published in 2020 deserved this award,” Co-Editor-in-Chief Anatoly Zayats said. “Finally, we decided to recommend these two articles based on the level of attention and recognition they gained from the readers. There is no doubt that they reflect the development trends in the field of optics and photonics.”
  • Journal
  • 21th Oct,2021
The image on the cover of High Power Laser Science and Engineering Volume 9, Issue 2, indicates that many laboratories worldwide began the search for lasers using different materials, operating at different wavelengths. In the UK, academia, industry and the central laboratories took up the challenge from the earliest days to develop these systems for a broad range of applications. The image is based on original research by Colin N. Danson et al. presented in their paper "A history of high-power laser research and development in the United Kingdom", High Power Laser Science and Engineering 9 (2), 02000e18 (2021).
  • Journal
  • 19th Oct,2021