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Abstract

A novel scheme for all-optical ultra-wideband signal source based on semiconductor fiber ring laser (SFRL) is proposed, in which three monocycle signals can be generated simultaneously. The effect of the bias current of the semiconductor optical amplifier (SOA) in the SFRL, the wavelength of the lasing light, the power and the wavelength of input signal light on the performance of the monocycle signals are analyzed through numerical simulation. The results show that the output monocycle pulses with better symmetry can be obtained when the bias current of SOA is in a range of 200−220 mA. The average power, the amplitude of the positive and negative pulses of the output monocycle pulses increase as the wavelength of the lasing light increases. A better performance of the monocycle pulses can be obtained under lower input signal optical power. The wavelength of the input signal light has a little effect on the output monocycle pulses.

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Authors and contacts

Zhao Zan-Shan¹,
Li Pei-Li²

Corresponding author:Zhao Zan-Shan,zhaozanshan@163.com

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参量符号	取值
有源区长度L/10^–4m	5.5
有源区宽度w/10^–6m	3.3
有源区厚度d/10^–7m	1.5
非辐射符合系统${c_1}$/10⁸s^–1	1.5
双分子复合系数${c_2}$/10^–16m³·s^–1	2.5
Auger复合系数${c_3}$/10^–40m⁶·s^–1	1.5
光限制因子Γ	0.3
折射率n_a	3.22
饱和功率${P_{{\rm{sat}}}}$/10^–2W	1.0
有源区损耗${\alpha _{{\rm{in}}}}$/10⁴m^–1	1.4
涂覆层损耗${\alpha _{\rm{c}}}$/10³m^–1	2.0
散射损耗${\alpha _{\rm{c}}}$/10³m^–1	1.0
导带中电子有效质量m_c/10^–32kg	4.1
价带中电子有效质量m_hh/10^–31kg	4.19
价带中空穴有效质量m_lh/10^–33kg	5.06
不包含两个耦合器耦合比的所有损耗${\varepsilon _1}$	0.4
耦合器1的耦合比${k_1}$	0.5
耦合器2的耦合比${k_2}$	0.5
ASE谱的起始波长${\lambda _1}$/10^–6m	1.40
ASE谱的结束波长${\lambda _{\rm{m}}}$/10^–6m	1.60
ASE谱的分段数m	10
SOA的分段数n	10
自发辐射因子β/10^–5	2
群速度${\nu _{\rm{g}}}$/10⁷m·s^–1	7.5

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Vol. 68, Issue 14 - 2019-07-20

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