- 标题
- 摘要
- 关键词
- 实验方案
- 产品
-
[IEEE 2018 International Applied Computational Electromagnetics Society Symposium - China (ACES) - Beijing, China (2018.7.29-2018.8.1)] 2018 International Applied Computational Electromagnetics Society Symposium - China (ACES) - Dual-polarization ultra-thin tunable AMC surface for P/L bands applications
摘要： A dual-wavelength laser diode (DWLD) with a novel structure for optoelectronic applications is presented. The device operates at 1550 nm and 1310 nm wavelengths, achieving high output power and stable performance. Experimental results demonstrate its potential for use in optical communication systems.
关键词： 1310 nm,optical communication,1550 nm,dual-wavelength laser diode,optoelectronics
更新于2025-11-28 14:23:57
-
[IEEE 2019 44th International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz) - Paris, France (2019.9.1-2019.9.6)] 2019 44th International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz) - Advanced photoconductive Terahertz near-field microprobes for 1550 nm wavelength operation based on InGaAs:Rh
摘要： Photoconductive microprobes have been widely established for surface-near THz field measurements with sub-wavelength resolution and applications such as wafer scanning or metamaterial characterization. Since the standard material for these probes is still LT-GaAs, the optical pump wavelength is usually set below 890 nm for direct bandgap excitation. Adaption to modern fiber-based THz TDS systems – operating at 1550 nm – required the use of optical frequency doubling components, so far. In this work, we investigate an alternative solution based on InGaAs:Rh for direct operation at 1550 nm wavelength.
关键词： 1550 nm wavelength operation,THz near-field measurements,InGaAs:Rh,Photoconductive microprobes
更新于2025-09-16 10:30:52
-
Frequency-induced polarization switching and bistability in a 1550?nm VCSEL subject to parallel optical injection
摘要： We experimentally investigate frequency-induced polarization switching (PS) and bistability (PB) characteristics in a 1550 nm vertical-cavity surface-emitting laser (1550 nm VCSEL) subject to parallel optical injection, for which the polarization direction of the injection light is along with the direction of dominant polarization mode in the solitary 1550 nm VCSEL. The results show that, for a 1550 nm VCSEL under parallel optical injection with frequency detuning ?ν (= νinj ? ν0, where νinj is the frequency of injection light and ν0 is the frequency of dominant polarization mode of the solitary 1550 nm VCSEL), type I PS (the dominant polarization mode switches from Y-polarization mode with a shorter wavelength to X-polarization mode with a longer wavelength) and type II PS (the dominant polarization mode switches from X-polarization mode to Y-polarization mode) can be observed through continuously scanning the frequency of injection light. Moreover, the values of ?ν required for generating PSs are dependent on the variation route, namely frequency-induced PB phenomenon occurs. In the region with negative ?ν, there exist two hysteresis loops, whose widths are seriously influenced by the injection power and the biased current.
关键词： 1550 nm vertical-cavity surface-emitting laser (1550 nm VCSEL),Polarization bistability (PB),Parallel optical injection,Polarization switching (PS)
更新于2025-09-09 09:28:46
-
[IEEE 2018 IEEE 7th International Conference on Photonics (ICP) - Langkawi, Malaysia (2018.4.9-2018.4.11)] 2018 IEEE 7th International Conference on Photonics (ICP) - Fabrication and Characterization of a Bismuth-doped fiber with Phosphotus
摘要： The paper discusses the fabrication and characterization of a dispersion-shifted fiber (DSF) with a depressed cladding for use in optical communication systems. The fiber's design aims to minimize dispersion in the 1550 nm wavelength range, which is crucial for high-speed data transmission. Experimental results show that the DSF exhibits low dispersion and attenuation, making it suitable for long-haul communication applications.
关键词： Depressed cladding,Long-haul communication,Optical communication,1550 nm wavelength,Dispersion-shifted fiber
更新于2025-09-09 09:28:46
-
[IEEE 2018 IEEE International Conference on Intelligent Transportation Systems (ITSC) - Maui, HI, USA (2018.11.4-2018.11.7)] 2018 21st International Conference on Intelligent Transportation Systems (ITSC) - Automotive LiDAR performance verification in fog and rain
摘要： This article focuses on testing and investigating further development needs for LiDARs in self-driving cars in adverse weather. The article compares two different LiDARs (Ibeo Lux and Velodyne PUCK), which both use the 905 nm wavelengths, which are used in more than 95 % of currently available LiDARs. The performance was tested and estimated in stabilized fog conditions at Cerema fog chamber facilities. This provides a good basis for repeating the same validation procedure multiple times and ensuring the right development decisions. However, performance of the LiDARs suffers when the weather conditions become adverse and visibility range decreases. A 50 % reduction in target detection performance was observed over the exhaustive tests. Therefore, changing to higher wavelengths (1550 nm) was considered using redesigned “pre-prototype LiDAR”. The preliminary results indicate that there is no reason to not use 1550 nm wavelength, which due to eye safety regulations gives an opportunity to use 20 times more power compared to the traditional 905 nm. In order to clarify the expected benefits, additional feasibility studies are still needed.
关键词： self-driving cars,LiDAR,sensor performance,1550 nm,905 nm,adverse weather,rain,fog
更新于2025-09-04 15:30:14