High-efficiency cladding-pumped Er/Yb co-doped alumino-phosphosilicate fiber for an extended L-band amplification

Le He; Yang Chen; Xiaoke Yin; Zhimu Gu; Shaokun Liu; Wenzhen Li; Yingbin Xing; Yingbo Chu; Nengli Dai; Jinyan Li

doi:10.1364/OL.509954

Optics Letters
Vol. 49,
Issue 1,
pp. 61-64
(2024)
•https://doi.org/10.1364/OL.509954

High-efficiency cladding-pumped Er/Yb co-doped alumino-phosphosilicate fiber for an extended L-band amplification

Le He, Yang Chen, Xiaoke Yin, Zhimu Gu, Shaokun Liu, Wenzhen Li, Yingbin Xing, Yingbo Chu, Nengli Dai, and Jinyan Li

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Le He, Yang Chen, Xiaoke Yin, Zhimu Gu, Shaokun Liu, Wenzhen Li, Yingbin Xing, Yingbo Chu, Nengli Dai, and Jinyan Li, "High-efficiency cladding-pumped Er/Yb co-doped alumino-phosphosilicate fiber for an extended L-band amplification," Opt. Lett. 49, 61-64 (2024)

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Table of Contents Category
- Fiber Optics and Optical Communications
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About this Article
History
- Original Manuscript: October 20, 2023
- Revised Manuscript: November 20, 2023
- Manuscript Accepted: November 21, 2023
- Published: December 19, 2023

Abstract

Extending the gain bandwidth of L-band optical fiber amplifier has provoked a widespread interest. To date, achieving a high-efficiency extended L-band amplification remains a challenge. Here, we report a cladding-pumped Er/Yb co-doped alumino-phosphosilicate fiber, prepared by the modified chemical vapor deposition process. We demonstrate the efficiency of alumino-phosphosilicate glass for cladding-pumped Er/Yb co-doped fiber, with a gain per unit fiber length of 0.45 dB/m at 1625 nm and a gain ripple of ∼9.4 dB. For 0.8 W pump power, the fiber exhibits a 20 dB gain bandwidth covering 1575–1625 nm and 6.9 dB noise figure at 1625 nm. Additionally, the utilization of multi-mode laser diode enables further significant power savings and cost reduction. To the best of our knowledge, Er/Yb co-doped fiber in alumino-phosphosilicate glass is first proposed, with a cladding-pumped scheme for enhancing an extended L-band performance.

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	EYDF1	EYDF2	EYDF3
Er₂O₃ (wt. %)	0.11	0.06	0.1
Yb₂O₃ (wt. %)	4.0	2.4	6.6
P₂O₅ / Al₂O₃	3.3	6.5	-
λ_Cutoff (nm)	1150	1190	1400
Core diameter (μm)	5.5	5.4	5.6
Cladding absorption @915 nm (dB/m)	0.55	0.25	0.69
Core absorption @1535 nm (dB/m)	24.53	15.83	24.46

	Scheme	Signal (dBm)	Gain (dB)	NF (dB)	Ripple (dB)
Er/Yb-P-silica [12]	Double-pass 1.9 W–915 nm MM-LD	−30	∼20 /1620 nm	<10	∼20
Er-Baria-silica [6]	1.6 W–978 nm SM-LDs	−23	15.9/1622 nm	-	∼20
Bi/Er/La-silica [5]	Dual-stage 1.88 W–1480 nm SM-LDs	−30	16/1625 nm	<12	∼20
Er/Yb-P-Al-silica [23]	1.2 W - 1480 nm SM-LDs	−25	12.9/1625 nm	6.3/1625 nm	∼15
This Letter*	0.8 W–915 nm MM-LD	−12	15.4/1625 nm	6.4/1625 nm	∼9.4
This Letter*	0.8 W–915 nm MM-LD	−25	20.6/1625 nm	6.9/1625 nm	∼12

	EYDF1	EYDF2	EYDF3
Er₂O₃ (wt. %)	0.11	0.06	0.1
Yb₂O₃ (wt. %)	4.0	2.4	6.6
P₂O₅ / Al₂O₃	3.3	6.5	-
λ_Cutoff (nm)	1150	1190	1400
Core diameter (μm)	5.5	5.4	5.6
Cladding absorption @915 nm (dB/m)	0.55	0.25	0.69
Core absorption @1535 nm (dB/m)	24.53	15.83	24.46

	Scheme	Signal (dBm)	Gain (dB)	NF (dB)	Ripple (dB)
Er/Yb-P-silica [12]	Double-pass 1.9 W–915 nm MM-LD	−30	∼20 /1620 nm	<10	∼20
Er-Baria-silica [6]	1.6 W–978 nm SM-LDs	−23	15.9/1622 nm	-	∼20
Bi/Er/La-silica [5]	Dual-stage 1.88 W–1480 nm SM-LDs	−30	16/1625 nm	<12	∼20
Er/Yb-P-Al-silica [23]	1.2 W - 1480 nm SM-LDs	−25	12.9/1625 nm	6.3/1625 nm	∼15
This Letter*	0.8 W–915 nm MM-LD	−12	15.4/1625 nm	6.4/1625 nm	∼9.4
This Letter*	0.8 W–915 nm MM-LD	−25	20.6/1625 nm	6.9/1625 nm	∼12

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Optics Letters