Photothermal-lensing measurements of two-photon absorption and two-photon-induced color centers in borosilicate glasses at 532 nm

W. T. White; M. A. Henesian; M. J. Weber

doi:10.1364/JOSAB.2.001402

Photothermal-lensing measurements of two-photon absorption and two-photon-induced color centers in borosilicate glasses at 532 nm

W. T. White, M. A. Henesian, and M. J. Weber

Journal of the Optical Society of America B
Vol. 2,
Issue 9,
pp. 1402-1408
(1985)
•https://doi.org/10.1364/JOSAB.2.001402

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W. T. White, M. A. Henesian, and M. J. Weber, "Photothermal-lensing measurements of two-photon absorption and two-photon-induced color centers in borosilicate glasses at 532 nm," J. Opt. Soc. Am. B 2, 1402-1408 (1985)

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History
- Original Manuscript: December 3, 1984
- Manuscript Accepted: May 23, 1985
- Published: September 1, 1985

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Abstract

Using photothermal lensing, we have measured two-photon absorption coefficients and have observed laser-induced solarization at 532 nm in the transparent borosilicate glasses BK-3, BK-7, and BK-10. The two-photon absorption coefficients at 532 nm are 0.6, 2.9, and 0.4 cm/TW for BK-3, BK-7, and BK-10, respectively. This is approximately 2 orders of magnitude smaller than the two-photon absorption coefficients of crystalline materials of comparable energy-band gap. Our results in BK-7 indicate that a two-photon processinitiates the solarization and that one-photon bleaching limits it. The maximum induced absorption at 532 nm in BK-7 is approximately 0.07 cm⁻¹ per GW/cm².

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Glass	${(\frac{\partial n}{\partial T})}_{p} (10^{- 6} K^{- 1})$ ^a	${(\frac{\partial l}{\partial T} / l)}_{p} (10^{- 6} K^{- 1})$ ^a	C_p (J/cm³/K)	n (633 nm)^a	$\frac{\partial (n l - l)}{\partial T} / l (10^{- 6} K^{- 1})$
BK-3	3.5	5.3	1.82^b	1.497	6.1
BK-7	1.5	7.1	2.15^a	1.515	5.2
BK-10	2.1	5.8	1.77^b	1.496	5.0

	Glass

Properties	BK-3	BK-7	BK-10
β (cm/TW)	0.6 ± 0.6	2.9 ± 1.5	0.4 ± 0.4
Band edge (eV)^a	4.4	4.0	4.5

Glass	${(\frac{\partial n}{\partial T})}_{p} (10^{- 6} K^{- 1})$ ^a	${(\frac{\partial l}{\partial T} / l)}_{p} (10^{- 6} K^{- 1})$ ^a	C_p (J/cm³/K)	n (633 nm)^a	$\frac{\partial (n l - l)}{\partial T} / l (10^{- 6} K^{- 1})$
BK-3	3.5	5.3	1.82^b	1.497	6.1
BK-7	1.5	7.1	2.15^a	1.515	5.2
BK-10	2.1	5.8	1.77^b	1.496	5.0

	Glass

Properties	BK-3	BK-7	BK-10
β (cm/TW)	0.6 ± 0.6	2.9 ± 1.5	0.4 ± 0.4
Band edge (eV)^a	4.4	4.0	4.5

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