scholarly journals A Circuit-Level Implementation of Voltage-Tuning Scheme for Realizing Optical PAM-4 Using Three-Segment Microring Modulator

2020 ◽  
Vol 10 (2) ◽  
pp. 91-106
Author(s):  
Rui Wang
Keyword(s):  
Data Transmission ◽  
Extinction Ratio ◽  
Pulse Amplitude ◽  
Optical Devices ◽  
Pulse Amplitude Modulation ◽  
Simulation Results ◽  
Level Transmitter ◽  
Transmitter Design ◽  
Tuning Scheme ◽  
Voltage Tuning

Silicon Photonics, as one of the solutions to satisfy ever-increasing data bandwidth growth, becomes more challenging due to the latest technologies such as Internet of Things (IoT). Higher order pulse amplitude modulation (PAM) schemes is one of the answers to push towards higher data transmission in the presence of bandwidth limited optical devices. In this paper, we have implemented a circuit-level PAM-4 transmitter design based on the voltage-tuning scheme for realizing optical PAM-4 using a three-segment microring modulator. Simulation results based on the extracted layout using TSMC 65nm LP technology and IMEC-ePIXfab SiPhotonics ISIPP50G technology show that our proposed circuit-level transmitter structure is able to achieve PAM-4 data rate of 25-Gb/s with extinction ratio of 9dB and PAM-4 energy efficiency of 0.5pJ/bit. The results also verify that the scheme is able to achieve high tuning flexibility, but the proposed transmitter will consume more power as a result.

scholarly journals Investigation of Ber Performances in Chaotic-Secured Optical Fiber Communication Systems using the 4-PAM Modulation Scheme

2021 ◽  
Vol 19 (6.2) ◽  
pp. 33
Author(s):  
Vu Anh Dao ◽  
Tran Thi Thanh Thuy ◽  
Truong Cao Dung ◽  
Nguyen Xuan Quyen
Keyword(s):  
Optical Fiber ◽  
Communication Systems ◽  
Optical Fiber Communication ◽  
Pulse Amplitude ◽  
Modulation Scheme ◽  
Pulse Amplitude Modulation ◽  
Bit Rate ◽  
Fiber Communication ◽  
Fiber Channel ◽  
Simulation Results

This paper presents a numerical simulation investigation on the bit error rate in a chaotic-secured fiber channel and a conventional fiber channel when propagating independently. The investigated communication system uses the pulse-amplitude modulation scheme (4-PAM) at the bit rate of 10 Gbps, the fiber length of 100 km, and the operation wavelength of 1550 nm. Our simulation results demonstrate both chaotic and non-chaotic transmission channels can well operate with the bit rate up to 20 Gbps with the BER smaller than 10-5 if dispersion and fiber loss issues are appropriately compensated without needing forwarderror-correction, showing high potential in physically secured optical fiber communication systems.

scholarly journals 100 Gbaud On–Off Keying/Pulse Amplitude Modulation Links in C-Band for Short-Reach Optical Interconnects

2021 ◽  
Vol 11 (9) ◽  
pp. 4284
Author(s):  
Oskars Ozolins ◽  
Xiaodan Pang ◽  
Aleksejs Udalcovs ◽  
Richard Schatz ◽  
Sandis Spolitis ◽  
...  
Keyword(s):  
Amplitude Modulation ◽  
Optical Interconnects ◽  
High Speed ◽  
Extinction Ratio ◽  
Optical Power ◽  
Single Mode ◽  
Pulse Amplitude ◽  
Single Mode Fiber ◽  
Decision Feedback ◽  
Pulse Amplitude Modulation

We experimentally evaluate the high-speed on–off keying (OOK) and four-level pulse amplitude modulation (PAM4) transmitter’s performance in C-band for short-reach optical interconnects. We demonstrate up to 100 Gbaud OOK and PAM4 transmission over a 400 m standard single-mode fiber with a monolithically integrated externally modulated laser (EML) having 100 GHz 3 dB bandwidth with 2 dB ripple. We evaluate its capabilities to enable 800 GbE client-side links based on eight, and even four, optical lanes for optical interconnect applications. We study the equalizer’s complexity when increasing the baud rate of PAM4 signals. Furthermore, we extend our work with numerical simulations showing the required received optical power (ROP) for a certain bit error rate (BER) for the different combinations of the effective number of bits (ENOB) and extinction ratio (ER) at the transmitter. We also show a possibility to achieve around 1 km dispersion uncompensated transmission with a simple decision feedback equalizer (DFE) for a 100 Gbaud OOK, PAM4, and eight-level PAM (PAM8) link having the received power penalty of around 1 dB.

scholarly journals PERFORMANCE EVALUATION OF ETHERNET TRANSMISSION USING M-ARY PULSE AMPLITUDE MODULATION TECHNIQUES

2021 ◽  
Vol 26 (4) ◽  
pp. 74-85
Author(s):  
APENA WALIU OLALEKAN ◽  
OLASUNKANMI OMOWUMI GRACE ◽  
SALAKO ANUOLUWAPO
Keyword(s):  
Performance Evaluation ◽  
Amplitude Modulation ◽  
Data Transmission ◽  
High Speed ◽  
Local Area Network ◽  
Pulse Amplitude ◽  
Error Rates ◽  
Full Duplex ◽  
Pulse Amplitude Modulation ◽  
Area Network

Low installation costs and high data rates reaching up to 10 Gbps, characterized Ethernet as the local area network (LAN) technology of choice to satisfy the increasing need for high-speed data transmission in packet-based networks. As demand for high speeds in data has increased, copper Ethernet has been integrated to handle these higher speeds. The IEEE 802.3ae* 2002 (10 Gigabit Ethernet) standard is based on data transmission over optical fibre only and in full-duplex mode. This study considered performance evaluation of Pulse Amplitude Modulation (PAM) and multilevel (PAM-16) technology in comparison with other PAM versions was carried out to investigate copper Ethernet with respect to higher speed characteristic and error performance. The evaluation was carried out in MATLAB R2017b simulation environment; this provides calculated bit error rates (BER) of the considered modulation schemes under different channel conditions. The results show that PAM-16 has a BER of .which is significantly lower than that of PAM-2 and PAM-4. Additionally, Hamming code were used to detect and correct errors that are inherent in the design and the efficiency of each level of PAM used was analyzed.

40 Gbit/s data transmission with 980 nm VCSELs at 120°C using four‐level pulse‐amplitude modulation

2015 ◽  
Vol 51 (19) ◽  
pp. 1517-1519 ◽  
Author(s):  
P. Wolf ◽  
J.A. Lott ◽  
D. Arsenijević ◽  
P. Moser ◽  
H. Li ◽  
...  
Keyword(s):  
Amplitude Modulation ◽  
Data Transmission ◽  
Pulse Amplitude ◽  
Pulse Amplitude Modulation
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