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Integrated Photonics for Free Space Communication and Sensing
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Integrated Photonics for Free Space Communication and Sensing

A special issue of Sensors (ISSN 1424-8220). This special issue belongs to the section "Optical Sensors".

Deadline for manuscript submissions: closed (20 January 2024) | Viewed by 9536

Special Issue Editors

Prof. Dr. Junfeng Song

E-Mail Website
Guest Editor
College of Electronic Science and Engineering, Jilin University, Changchun 130033, China
Interests: photonics; optics and photonics; optics and lasers; optoelectronics; nonlinear optics
Special Issues, Collections and Topics in MDPI journals
Dr. Guoqiang Lo

E-Mail Website
Guest Editor
Advanced Micro Foundry Pte Ltd., Singapore City 117685, Singapore
Interests: integrated photonics technology and applications
Dr. Juejun Hu

E-Mail Website
Guest Editor
Department of Materials Science and Engineering, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
Interests: integrated photonics and sensors
Prof. Dr. Andrea Melloni

E-Mail Website
Guest Editor
Dipartimento di Elettronica, Informazione, e Bioingegneria, Politecnico di Milano, P.za Leonardo da Vinci, 32, 20133 Milano, Italy
Interests: integrated photonics sensing and communication

Special Issue Information

Dear Colleagues,

Free space optical communication, praised as a powerful communication method in addition to visible light, microwave and fiber-optics communication, has been attracting great interest in wide areas. By virtue of rapid development in integrated optics, especially in silicon-based photonics, a series of optoelectronic integrated devices featured by unique characteristics and excellent performance have been developed in recent year. It provides a good opportunity for the development of free space optical communication.

The special issue is aimed to pool original researches and overview articles including the progress, techniques, solutions, applications and new challenges of the latest integrated optoelectronic devices in the field of space optical communication.

Potential topics include but are not limited to:

  • Free Space Optical Communications;
  • Angle momentum photonics, generation, communication and sensing;
  • Light Detection and Ranging (Lidar) or Laser Radar;
  • High power and narrow-linewidth semiconductor Laser;
  • Frequency sweep and tunable laser;
  • Acquisition tracking and positioning (ATP);
  • Photonic antenna;
  • Quantum optical communications;
  • Single photon avalanche diode (SPAD);
  • Short-wave infrared sensors;
  • Transceiver;
  • Optical communication signal processing.

Prof. Dr. Junfeng Song
Dr. Guoqiang Lo
Dr. Juejun Hu
Prof. Dr. Andrea Melloni
Guest Editors

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Sensors is an international peer-reviewed open access semimonthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2600 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • free space optical communication
  • integrated photonics
  • silicon photonics
  • angle momentum photonics
  • lidar
  • short-wave infrared sensors
  • SPAD

Published Papers (5 papers)

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Research

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10 pages, 3732 KiB  
Article
Reconfigurable Laser-Stimulated Lock-In Thermography for Surface Micro-Crack Detection
by Lu Ding, Sergey Gorelik, Pei Wang, Anton Valentinovich Sadovoy, Qiang Zhu, Andrew Chun Yong Ngo and Jinghua Teng
Sensors 2023, 23(8), 4090; https://doi.org/10.3390/s23084090 - 19 Apr 2023
Cited by 1 | Viewed by 1273
Abstract
Surface crack detection and sizing is essential for the manufacturing and maintenance of engines, run parts, and other metal elements of aircrafts. Among various non-destructive detection methods, the fully non-contact and non-intrusive technique based on laser-stimulated lock-in thermography (LLT) has recently attracted a [...] Read more.
Surface crack detection and sizing is essential for the manufacturing and maintenance of engines, run parts, and other metal elements of aircrafts. Among various non-destructive detection methods, the fully non-contact and non-intrusive technique based on laser-stimulated lock-in thermography (LLT) has recently attracted a lot of attention from the aerospace industry. We propose and demonstrate a system of reconfigurable LLT for three-dimensional surface crack detection in metal alloys. For large area inspection, the multi-spot LLT can speed up the inspection time by a factor of the number of spots. The minimum resolved size of micro-holes is ~50 µm in diameter limited by the magnification of the camera lens. We also study the crack length ranging from 0.8 to 3.4 mm by varying the modulation frequency of LLT. An empirical parameter related to the thermal diffusion length is found to show the linear dependence with the crack length. With the proper calibration, this parameter can be used to predict the sizing of the surface fatigue cracks. Reconfigurable LLT allows us to quickly locate the crack position and accurately measure its dimensions. This method is also applicable to the non-destructive detection of surface or sub-surface defect in other materials used in various industries. Full article
(This article belongs to the Special Issue Integrated Photonics for Free Space Communication and Sensing)
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13 pages, 5793 KiB  
Article
Fully Integrated Line Array Angular Displacement Sensing Chip
by Yunhao Fu, Jiaqi Jiang, Zhuang Zhao, Zhongyuan Zhao, Kaixin Chen, Min Tao, Yuchun Chang, Guoqiang Lo and Junfeng Song
Sensors 2023, 23(5), 2431; https://doi.org/10.3390/s23052431 - 22 Feb 2023
Viewed by 1305
Abstract
The angular displacement sensor is a digital angular displacement measurement device that integrates optics, mechanics, and electronics. It has important applications in communication, servo control, aerospace, and other fields. Although conventional angular displacement sensors can achieve extremely high measurement accuracy and resolution, they [...] Read more.
The angular displacement sensor is a digital angular displacement measurement device that integrates optics, mechanics, and electronics. It has important applications in communication, servo control, aerospace, and other fields. Although conventional angular displacement sensors can achieve extremely high measurement accuracy and resolution, they cannot be integrated because complex signal processing circuitry is required at the photoelectric receiver, which limits their suitability for robotics and automotive applications. The design of a fully integrated line array angular displacement-sensing chip is presented for the first time using a combination of pseudo-random and incremental code channel designs. Based on the charge redistribution principle, a fully differential 12-bit, 1 MSPS sampling rate successive approximation analog-to-digital converter (SAR ADC) is designed for quantization and subdivision of the incremental code channel output signal. The design is verified with a 0.35 μm CMOS process and the area of the overall system is 3.5 × 1.8 mm2. The fully integrated design of the detector array and readout circuit is realized for the angular displacement sensing. Full article
(This article belongs to the Special Issue Integrated Photonics for Free Space Communication and Sensing)
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11 pages, 3404 KiB  
Article
A 1-μm-Band Injection-Locked Semiconductor Laser with a High Side-Mode Suppression Ratio and Narrow Linewidth
by Jia-Qi Chen, Chao Chen, Qi Guo, Li Qin, Jian-Wei Zhang, Hang-Yu Peng, Yin-Li Zhou, Jing-Jing Sun, Hao Wu, Yong-Sen Yu, Yong-Qiang Ning and Li-Jun Wang
Sensors 2022, 22(23), 9239; https://doi.org/10.3390/s22239239 - 28 Nov 2022
Cited by 1 | Viewed by 1910
Abstract
We demonstrate a narrow-linewidth, high side-mode suppression ratio (SMSR) semiconductor laser based on the external optical feedback injection locking technology of a femtosecond-apodized (Fs-apodized) fiber Bragg grating (FBG). A single frequency output is achieved by coupling and integrating a wide-gain quantum dot (QD) [...] Read more.
We demonstrate a narrow-linewidth, high side-mode suppression ratio (SMSR) semiconductor laser based on the external optical feedback injection locking technology of a femtosecond-apodized (Fs-apodized) fiber Bragg grating (FBG). A single frequency output is achieved by coupling and integrating a wide-gain quantum dot (QD) gain chip with a Fs-apodized FBG in a 1-μm band. We propose this low-cost and high-integration scheme for the preparation of a series of single-frequency seed sources in this wavelength range by characterizing the performance of 1030 nm and 1080 nm lasers. The lasers have a maximum SMSR of 66.3 dB and maximum output power of 134.6 mW. Additionally, the lasers have minimum Lorentzian linewidths that are measured to be 260.5 kHz; however, a minimum integral linewidth less than 180.4 kHz is observed by testing and analyzing the power spectra of the frequency noise values of the lasers. Full article
(This article belongs to the Special Issue Integrated Photonics for Free Space Communication and Sensing)
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Review

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22 pages, 3504 KiB  
Review
A Review of High-Power Semiconductor Optical Amplifiers in the 1550 nm Band
by Hui Tang, Changjin Yang, Li Qin, Lei Liang, Yuxin Lei, Peng Jia, Yongyi Chen, Yubing Wang, Yue Song, Cheng Qiu, Chuantao Zheng, Xin Li, Dabing Li and Lijun Wang
Sensors 2023, 23(17), 7326; https://doi.org/10.3390/s23177326 - 22 Aug 2023
Cited by 1 | Viewed by 2465
Abstract
The 1550 nm band semiconductor optical amplifier (SOA) has great potential for applications such as optical communication. Its wide-gain bandwidth is helpful in expanding the bandwidth resources of optical communication, thereby increasing total capacity transmitted over the fiber. Its relatively low cost and [...] Read more.
The 1550 nm band semiconductor optical amplifier (SOA) has great potential for applications such as optical communication. Its wide-gain bandwidth is helpful in expanding the bandwidth resources of optical communication, thereby increasing total capacity transmitted over the fiber. Its relatively low cost and ease of integration also make it a high-performance amplifier of choice for LiDAR applications. In recent years, with the rapid development of quantum-well (QW) material systems, SOAs have gradually overcome the shortcomings of polarization sensitivity and high noise. The research on quantum-dot (QD) materials has further improved the noise characteristics and transmission loss of SOAs. The design of special waveguide structures—such as plate-coupled optical waveguide amplifiers and tapered amplifiers—has also increased the saturation output power of SOAs. The maximum gain of the SOA has been reported to be more than 21 dB. The maximum saturation output power has been reported to be more than 34.7 dBm. The maximum 3 dB gain bandwidth has been reported to be more than 120 nm, the lowest noise figure has been reported to be less than 4 dB, and the lowest polarization-dependent gain has been reported to be 0.1 dB. This study focuses on the improvement and enhancement of the main performance parameters of high-power SOAs in the 1550 nm band and introduces the performance parameters, the research progress of high-power SOAs in the 1550 nm band, and the development and application status of SOAs. Finally, the development trends and prospects of high-power SOAs in the 1550 nm band are summarized. Full article
(This article belongs to the Special Issue Integrated Photonics for Free Space Communication and Sensing)
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23 pages, 7367 KiB  
Review
Research Progress of Horizontal Cavity Surface-Emitting Laser
by Jishun Liu, Yue Song, Yongyi Chen, Li Qin, Lei Liang, Shen Niu, Ye Wang, Peng Jia, Cheng Qiu, Yuxin Lei, Yubing Wang, Yongqiang Ning and Lijun Wang
Sensors 2023, 23(11), 5021; https://doi.org/10.3390/s23115021 - 24 May 2023
Viewed by 1878
Abstract
The horizontal cavity surface emitting laser (HCSEL) boasts excellent properties, including high power, high beam quality, and ease of packaging and integration. It fundamentally resolves the problem of the large divergence angle in traditional edge-emitting semiconductor lasers, making it a feasible scheme for [...] Read more.
The horizontal cavity surface emitting laser (HCSEL) boasts excellent properties, including high power, high beam quality, and ease of packaging and integration. It fundamentally resolves the problem of the large divergence angle in traditional edge-emitting semiconductor lasers, making it a feasible scheme for realizing high-power, small-divergence-angle, and high-beam-quality semiconductor lasers. Here, we introduce the technical scheme and review the development status of HCSELs. Firstly, we thoroughly analyze the structure, working principles, and performance characteristics of HCSELs according to different structures, such as the structural characteristics and key technologies. Additionally, we describe their optical properties. Finally, we analyze and discuss potential development prospects and challenges for HCSELs. Full article
(This article belongs to the Special Issue Integrated Photonics for Free Space Communication and Sensing)
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