Dual-Wavelength Laser Fiber Phase Noise Suppression Based on Ultra-Cold Erbium Atoms

Fig. 1. Schematic of fiber phase noise suppression system. (a) Schematic of traditional single-wavelength fiber phase noise suppression system; (b) schematic of dual-wavelength fiber phase noise suppression system

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Fig. 2. Experimental apparatus of the system

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Fig. 3. Typical linewidths and Lorenz fit results of beat signals of fiber phase noise suppression system. (a) Before locking the single-wavelength fiber phase noise suppression system; (b) after locking the single-wavelength fiber phase noise suppression system; (c) before locking the dual-wavelength fiber phase noise suppression system; (d) after locking the dual-wavelength fiber phase noise suppression system

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Fig. 4. Allan deviation of beat frequency signal

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Table 1. Average and standard deviation of beat frequency signal linewidth measured 6 times

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Table 1. Average and standard deviation of beat frequency signal linewidth measured 6 times

Phase noise suppression system		Resolution bandwidth （RBW）of FFT	Linewidth	Standard deviation
1299 nm	Unlock	4 Hz	13.8 Hz	2.5 Hz
1299 nm	Lock	0.2441 mHz	0.43 mHz	0.04 mHz
1166 nm	Unlock	4 Hz	14.6 Hz	2.8 Hz
1166 nm	Lock	7.813 mHz	11.6 mHz	1.3 mHz

Table 2. Test condition of frequency transmission stability

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Table 2. Test condition of frequency transmission stability

Item	Test condition		Stability（ADEV）
Item	Test condition		1 s	1000 s
（1）	PD_{1299 nm}	Unlock_{1299 nm}	$9.5 \times 10^{- 16}$	$1.6 \times 10^{- 16}$
（2）		Lock_{1299 nm}	$1.4 \times 10^{- 16}$	$1.3 \times 10^{- 19}$
（3）		Lock_{1166 nm}	$3.6 \times 10^{- 17}$	$6.5 \times 10^{- 19}$
（4）	PD_{1166 nm}	Unlock_{1166 nm}	$9.5 \times 10^{- 16}$	$2.8 \times 10^{- 16}$
（5）	PD_{1166 nm}	Lock_{1166 nm}	$3 \times 10^{- 17}$	$3.1 \times 10^{- 20}$

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Wenmin Liao, Sihui Zhang, Yuqing Duan, Jie Wang, Haibin Wu. Dual-Wavelength Laser Fiber Phase Noise Suppression Based on Ultra-Cold Erbium Atoms[J]. Laser & Optoelectronics Progress, 2024, 61(5): 0506004

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Paper Information

Category: Fiber Optics and Optical Communications

Received: Apr. 21, 2023

Accepted: May. 6, 2023

Published Online: Mar. 5, 2024

The Author Email: Jie Wang (jwang@lps.ecnu.edu.cn)

DOI:10.3788/LOP231135

CSTR:32186.14.LOP231135

Topics

laser devices and laser physics

Lasers and Laser Optics

Laser physics

laser manufacturing

Instrumentation, Measurement and Metrology