Generator Systems for Optical Subcarriers Based on Ring Resonator in Series and Parallel with Phase Modulation

Nogueira, José Danilo da Silva; Fonseca Neto, João Pinto da; Silva, João Batista Rosa

doi:10.1590/2179-10742021v20i3254755

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Journal of Microwaves, Optoelectronics and Electromagnetic Applications

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Article • J. Microw. Optoelectron. Electromagn. Appl. 20 (3) • Sept 2021 • https://doi.org/10.1590/2179-10742021v20i3254755 copy

Generator Systems for Optical Subcarriers Based on Ring Resonator in Series and Parallel with Phase Modulation

Authorship SCIMAGO INSTITUTIONS RANKINGS

Abstract

This work presents four systems for generation of optical subcarriers in the C-band in optical communications, based on serial and parallel amplified optical ring resonator with phase modulation and 10 GHz spectral spacing between subcarriers. The systems were numerically simulated and were able to generate between 83 to 145 subcarriers with output power levels of −5 to 26 dBm for an input power of 0 dBm and with flatness of 1.4 to 8 dB with a minimum OSNR of 30 dB.

Index Terms
optical loop; phase modulator; subcarrier generator

Components	Parameters
Laser (LD)	Optical Power: 0 dBm Frequency: 193.1 THz Linewidth: 100 kHz
Beamsplitter (BS)	Coupling coefficient: 0.5
Phase modulator (PM)	RF: 10 GHz
EDFA System I	Foward pump power: 10 mW length: 3 m
EDFA System II	Foward pump power: 10 mW length: 3 m
EDFA System III	Foward pump power: 15 mW length: 3 m
EDFA System IV	Foward pump power: 20 mW
Single mode fiber (SMF)	length: 3 m Attenuation: 0.2 dB/km

Power (dBm)	Subcarries	Flatness (dB)	OSNR (dB)
0	96	2.4	50
−2	141	3.4	48

Power (dBm)	Subcarries	Flatness (dB)	OSNR (dB)
0	83	3.3	60
−5	89	8.0	55

Power (dBm)	Subcarries	Flatness (dB)	OSNR (dB)
26	89	1.4	35
23	95	4.2	30

Power (dBm)	Subcarries	Flatness (dB)	OSNR (dB)
3	139	2.1	50
0	145	5	45

Generator	Input power	Subcarries	Subcarrier spacing	Flatness	OSNR
System I	0 dBm	96	10 GHz	2.4 dB	50 dB
System II	0 dBm	83	10 GHz	3.3 dB	60 dB
system III	0 dBm	89	10 GHz	1.4 dB	35 dB
system IV	0 dBm	139	10 GHz	2.1 dB	50 dB
[ ²¹[21] J. Zhang, N. Chi, J. Yu, Y. Shao, J. Zhu, B. Huang, and L. Tao, “Generation of coherent and frequency-lock multicarriers using cascaded phase modulators and recirculating frequency shifter for Tb/s optical communication,” Opt. Express, vol. 19, no. 14, pp. 12891–12902, Jul 2011. ]	14.5 dBm	113	25 GHz	5.0 dB	26 dB
[ ¹⁵[15] M. L. M. dos Santos, L. Huancachoque, A. I. N. B. Pereira, D. V. G. Nascimento, and A. C. Bordonalli, “Optical frequency comb generation using ultralong soa and different amplification methods in mzm-based optical fiber loops,” in 2019 SBMO/IEEE MTT-S International Microwave and Optoelectronics Conference (IMOC), pp. 1–3, 2019. ]	11 dBm	30	20 GHz	-	-
[ ¹²[12] M. Yamamoto, Y. Tanaka, T. Shioda, T. Kurokawa, and K. Higuma, “Optical Frequency Comb Generation Using Dual Frequency Optical Phase Modulation,” Integrated Photonics Research and Applications/Nanophotonics for Information Systems, p. ITuF5, 2005. ]	0 dBm	29	10 GHz	5 dB	-

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