Highly nonlinear GeS<sub>2</sub>-based chalcohalide glass for all-optical twin-core-fiber switching

D. Marchese; M. De Sario; A. Jha; A. K. Kar; E. C. Smith

doi:10.1364/JOSAB.15.002361

Journal of the Optical Society of America B
Vol. 15,
Issue 9,
pp. 2361-2370
(1998)
•https://doi.org/10.1364/JOSAB.15.002361

Highly nonlinear GeS₂-based chalcohalide glass for all-optical twin-core-fiber switching

D. Marchese, M. De Sario, A. Jha, A. K. Kar, and E. C. Smith

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D. Marchese, M. De Sario, A. Jha, A. K. Kar, and E. C. Smith, "Highly nonlinear GeS₂-based chalcohalide glass for all-optical twin-core-fiber switching," J. Opt. Soc. Am. B 15, 2361-2370 (1998)

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Abstract

A new ${GeS}_{2}$ -based chalcohalide glass was synthesized by the melt-quenching technique for nonlinear optical applications. A large glass-forming region was defined, and a wide infrared transmission was measured. Marked optical third-order nonlinearity was measured $(n_{2} \approx 7.5 \times 10^{- 5} {cm}^{2} / GW),$ making this glass one of the best candidates for ultrafast nonlinear optical applications. All-optical switching in the second telecommunication window $(λ = 1.31 μ m)$ by control of the optical pulse intensity in a twin-core-fiber directional coupler was numerically modeled, and a crossover length of 9.25 mm was calculated.

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Glass Number	${GeS}_{2} - {Ga}_{2} S_{3} - CsI$ (mol %)	$V_{M}$ $({cm}^{3} / mol)$	ρ $(g / {cm}^{3})$	n	$n_{2}$ $({cm}^{2} {GW}^{- 1} \times 10^{- 5})$	β $(cm {GW}^{- 1})$	T	W	$(ℏ ω / E_{g})$
1	92–08–00	14.72	3.07	–	–	–	–	–	–
2	85–15–00	14.83	3.01	1.9940	2.20	0.60	19.20	>5.3	0.631
6	85–11–04	16.49	3.06	2.1600	3.10	1.45	3.30	>7.4	0.684
7	85–07–08	16.78	3.13	2.1330	–	–	–	–	0.661
8	79–15–06	16.70	3.07	2.1560	–	–	–	–	0.659
9	74–20–06	16.51	3.09	2.1290	2.50	0.80	2.26	>6.0	0.666
11	85–10–05	16.72	3.07	2.1500	–	–	–	–	0.666
12	80–10–10	17.71	3.10	2.1180	2.25	0.95	3.04	>5.3	0.659
13	95–00–05	16.61	3.00	2.1499	–	–	–	–	–
14	75–15–10	17.77	3.05	2.1141	1.65	0.40	1.71	>4.0	0.771
15	92–03–05	17.03	2.93	2.1320	–	–	–	–	–
16	70–15–15	18.29	3.20	2.1018	–	–	–	–	–
25	$75 - 10 - 10 - 05 ({Ag}_{2} S)$	–	–	2.1445	7.50	2.20	2.05	>18.0	–

Core refractive index, $n_{cr}$ 2.1445
Cladding refractive index, $n_{cl}$ 2.1330
Core radius, $r_{cr}$ 1.5 μm
Linear absorption coefficient, α0.1 dB/m
Two-photon absorption coefficient, β $2.20 cm {GW}^{- 1}$
W $(λ_{m} = 705 nm)$ >18
Nonlinear refractive index, $n_{2}$ $7.50 \times 10^{- 5} {cm}^{2} {GW}^{- 1}$
Center core distance, $d_{cr}$ 10.0 μm
Core refractive-index profileQuadratic

Glass Number	${GeS}_{2} - {Ga}_{2} S_{3} - CsI$ (mol %)	$V_{M}$ $({cm}^{3} / mol)$	ρ $(g / {cm}^{3})$	n	$n_{2}$ $({cm}^{2} {GW}^{- 1} \times 10^{- 5})$	β $(cm {GW}^{- 1})$	T	W	$(ℏ ω / E_{g})$
1	92–08–00	14.72	3.07	–	–	–	–	–	–
2	85–15–00	14.83	3.01	1.9940	2.20	0.60	19.20	>5.3	0.631
6	85–11–04	16.49	3.06	2.1600	3.10	1.45	3.30	>7.4	0.684
7	85–07–08	16.78	3.13	2.1330	–	–	–	–	0.661
8	79–15–06	16.70	3.07	2.1560	–	–	–	–	0.659
9	74–20–06	16.51	3.09	2.1290	2.50	0.80	2.26	>6.0	0.666
11	85–10–05	16.72	3.07	2.1500	–	–	–	–	0.666
12	80–10–10	17.71	3.10	2.1180	2.25	0.95	3.04	>5.3	0.659
13	95–00–05	16.61	3.00	2.1499	–	–	–	–	–
14	75–15–10	17.77	3.05	2.1141	1.65	0.40	1.71	>4.0	0.771
15	92–03–05	17.03	2.93	2.1320	–	–	–	–	–
16	70–15–15	18.29	3.20	2.1018	–	–	–	–	–
25	$75 - 10 - 10 - 05 ({Ag}_{2} S)$	–	–	2.1445	7.50	2.20	2.05	>18.0	–

Core refractive index, $n_{cr}$ 2.1445
Cladding refractive index, $n_{cl}$ 2.1330
Core radius, $r_{cr}$ 1.5 μm
Linear absorption coefficient, α0.1 dB/m
Two-photon absorption coefficient, β $2.20 cm {GW}^{- 1}$
W $(λ_{m} = 705 nm)$ >18
Nonlinear refractive index, $n_{2}$ $7.50 \times 10^{- 5} {cm}^{2} {GW}^{- 1}$
Center core distance, $d_{cr}$ 10.0 μm
Core refractive-index profileQuadratic

Abstract

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Journal of the Optical Society of America B