Influence mechanism of repetition frequency on pulse position modulation in deep space laser communication

Zhan, Weida; Hao, Zhibiao; Li, Rui; Tang, Yanfeng; Wang, Yijun

doi:10.1007/s10586-018-2313-x

Cited by 8 publications

(8 citation statements)

References 4 publications

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“…Compared to OOK, the PPM modulation is primarily useful for optical communications systems, which have little or no multipath interference, and lower power consumption [46]. The principle of PPM is to divide a certain time period into M slots.…”

Section: ) Modulation Modesmentioning

confidence: 99%

A Survey on Laser Space Network: Terminals, Links, and Architectures

Lin

Liu

et al. 2022

IEEE Access

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Due to the high directionality and short wavelength of laser transmission in space, satellite laser communication can achieve high speed, wide bandwidth, high precision, and high security with no electromagnetic spectrum constraints. It has become a promising direction to construct the laser space network. Recently, relative products, on-orbit demonstrations, and researches have been conducted on laser space networks. Considering this network as a graph, this paper presents a comprehensive survey from nodes, edges, to architectures of this graph, corresponding to laser communication terminals, laser space links, and laser space network architectures. For each content, current achievements are introduced and future trends are analyzed accordingly. Through this survey paper, we aim to present the prospect to develop laser space networks in the next space generation and provide potential research directions to interested researchers or engineers.

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Section: ) Modulation Modesmentioning

confidence: 99%

A Survey on Laser Space Network: Terminals, Links, and Architectures

Lin

Liu

et al. 2022

IEEE Access

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“…In order to solve the problems of clock synchronization and bandwidth efficiency, many research have been carried out. According to the characteristics of the traditional modulation methods, many modulation and demodulation methods have been developed using coding and mixing with traditional methods to improve the energy and bandwidth efficiencies [24][25][26][27][28][29][30][31][32][33][34][35][36][37][38][39][40]. Many new modulation methods have been proposed based on PPM to improve the performance of PPM from the perspective of bandwidth efficiency, such as multi-pulse position modulation (MPPM) [26][27][28], differential pulse-position modulation (DPPM) [29,30], differential multi-pulse position modulation (DMPPM) [31,32], and differential amplitude pulse-position modulation (DAPPM) [33,34].…”

Section: Introductionmentioning

confidence: 99%

“…Many new modulation methods have been proposed based on PPM to improve the performance of PPM from the perspective of bandwidth efficiency, such as multi-pulse position modulation (MPPM) [26][27][28], differential pulse-position modulation (DPPM) [29,30], differential multi-pulse position modulation (DMPPM) [31,32], and differential amplitude pulse-position modulation (DAPPM) [33,34]. In [35,36], The author has conducted theoretical research and comparison on the bandwidth requirements of OOK, PPM, MPPM, DPPM, DMPPM. The research results show that under the same data transmission rate Rb, the bandwidth requirements of MPPM, DPPM and DMPPM are lower than that of PPM, but when M=8, their bandwidth requirements are still higher than 5 times the bandwidth requirements of OOK (as shown in Figure 7 of the literature [35]).…”

Section: Introductionmentioning

confidence: 99%

“…In [35,36], The author has conducted theoretical research and comparison on the bandwidth requirements of OOK, PPM, MPPM, DPPM, DMPPM. The research results show that under the same data transmission rate Rb, the bandwidth requirements of MPPM, DPPM and DMPPM are lower than that of PPM, but when M=8, their bandwidth requirements are still higher than 5 times the bandwidth requirements of OOK (as shown in Figure 7 of the literature [35]). In [38], the authors experimentally demonstrated double pulse-position modulation and DPPM in time-wavelength optical code-division-multiple-access (OCDMA) systems.…”

Section: Introductionmentioning

confidence: 99%

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Pulse-number modulation method for free-space optical communication based on FPGA

Peng,

Ouyang,

et al. 2023

6th Optics Young Scientist Summit (OYSS 2023)

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In free-space optical (FSO) communication, with the increase of bit resolution of M, the required bandwidth of PPM and DPIM increase sharply, and the bandwidth efficiency are extremely low. There is also a clock synchronization problem in the demodulation process of PPM and OOK. We propose a pulsed-laser pulse-number modulation (PNM) method to address the high required bandwidth and low bandwidth efficiency for high-order modulation in FSO communication with traditional modulation methods. The symbol structure, power efficiency and bandwidth properties of PNM are presented. The modulation and demodulation of PNM are simple and easy to implement without complex clock synchronization processing. Additionally, we use the FPGA as the core controller to build an FSO communication system, which realizes accurate modulation and demodulation of data with PNM modulation method under the communication distance of 27 m and the bit rate of 2.5K bps.

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“…In recent years, the study of short laser pulses has become a sustained and attractive topic in the field of laser due to its extensive applications, such as industrial processing [1,2], medical surgery [3,4], optical surveying [5,6], optical communication [7,8] and scientific research [9,10]. This short laser pulses having pulse duration from microsecond to femtosecond can be generated by utilizing the Q-switching or mode-locking technique.…”

Section: Introductionmentioning

confidence: 99%

Utilization of group 10 2D TMDs-PdSe₂ as a nonlinear optical material for obtaining switchable laser pulse generation modes

et al. 2020

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In-plane anisotropic two-dimensional (2D) materials have gained considerable interest in the field of research, due to having the potential of being used in different device applications. Recently, among these 2D materials, group 10 transition metal dichalcogenides (TMDs) pentagonal Palladium diselenide (PdSe2) is utilized in various sections of researches like nanoelectronics, thermoelectric, spintronics, optoelectronics, and ultrafast photonics, owing to its high air stability and broad absorption spectrum properties. In this paper, it is demonstrated that by utilizing this novel 2D layered PdSe2 material as a saturable absorber (SA) in an EDF laser system, it is possible to obtain switchable laser pulse generation modes. At first, the Q-switching operation mode is attained at a threshold pump power of 56.8 mW at 1564 nm, where the modulation range of pulse duration and repetition rate is 18.5 μs–2.0 μs and 16.4 kHz–57.0 kHz, respectively. Afterward, the laser pulse generation mode is switched to the mode-locked state at a pump power of 63.1 mW (threshold value) by changing the polarization condition inside the laser cavity, and this phenomenon persists until the maximum pump power of 230.4 mW. For this mode-locking operation, the achieved pulse duration is 766 fs, corresponding to the central wavelength and 3 dB bandwidth of 1566 nm and 4.16 nm, respectively. Finally, it is illustrated that PdSe2 exhibits a modulation depth of 7.01%, which substantiates the high nonlinearity of the material. To the best of the authors’ knowledge, this is the first time of switchable modes for laser pulse generation are achieved by using this PdSe2 SA. Therefore, this work will encourage the research community to carry out further studies with this PdSe2 material in the future.

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Influence mechanism of repetition frequency on pulse position modulation in deep space laser communication

Cited by 8 publications

References 4 publications

A Survey on Laser Space Network: Terminals, Links, and Architectures

A Survey on Laser Space Network: Terminals, Links, and Architectures

Pulse-number modulation method for free-space optical communication based on FPGA

Utilization of group 10 2D TMDs-PdSe₂ as a nonlinear optical material for obtaining switchable laser pulse generation modes

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Influence mechanism of repetition frequency on pulse position modulation in deep space laser communication

Cited by 8 publications

References 4 publications

A Survey on Laser Space Network: Terminals, Links, and Architectures

A Survey on Laser Space Network: Terminals, Links, and Architectures

Pulse-number modulation method for free-space optical communication based on FPGA

Utilization of group 10 2D TMDs-PdSe2 as a nonlinear optical material for obtaining switchable laser pulse generation modes

Contact Info

Product

Resources

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Utilization of group 10 2D TMDs-PdSe₂ as a nonlinear optical material for obtaining switchable laser pulse generation modes