Optical bistabilities, phase transitions, and Q-switch characteristics of an N<sub>2</sub>O laser with a saturable NH<sub>3</sub> absorber

J. W. Won

doi:10.1364/OL.8.000079

Optics Letters
Vol. 8,
Issue 2,
pp. 79-81
(1983)
•https://doi.org/10.1364/OL.8.000079

Optical bistabilities, phase transitions, and Q-switch characteristics of an N₂O laser with a saturable NH₃ absorber

J. W. Won

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J. W. Won, "Optical bistabilities, phase transitions, and Q-switch characteristics of an N₂O laser with a saturable NH₃ absorber," Opt. Lett. 8, 79-81 (1983)

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Abstract

Results of a systematic investigation of an N₂O laser with an internal NH₃ absorber are reported. Bistability between the cw and off as well as between the cw and Q-switched states is observed. The transitions in the former case resemble first-order phase transitions; whereas in the latter case first- and/or second-order transitions occur. The laser-power dependence of the bistability and Q-switched behavior is investigated in detail. In particular, fluctuations are found to be enhanced near the phase-transition points.

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Cycle
Laser Power (W)	I	II	III	IV	V	VI	VII	VIII	IX	X	XI	XII
Laser Power (W)
5.0	0	1.1–2.7	3.3	4.0	5.1	5.3	–	(5.4)	5.5–5.8	5.8–20.0	20.0–29.0	≥29.0
4.5	0	1.1–2.7	3.3	4.0	(5.0)	5.1	–	(5.3)	5.5–5.7	5.7–16.4	16.4–22.7	≥22.7
4.0	0	1.1–2.7	3.2	3.3	–	–	–	(3.7)	4.0–5.5	5.5–13.3	13.3–18.7	≥18.7
3.5	0	1.1–2.7	2.8	3.0	–	–	–	(3.2)	3.3–5.3	5.3–8.0	8.0–13.5	≥13.5
3.0	0	1.1-1.7	2.3	–	–	–	2.5	2.7	2.7–4.3	4.3–6.1	6.1–13.3	≥13.3
2.5	0	1.1–2.1	2.2	–	–	–	2.3	(2.4)	2.7–4.0	4.0–5.7	5.7–9.3	≥9.3
2.0	0	1.1	1.9	–	–	–	2.1	(2.2)	2.3–3.2	–	5.3–7.6	≥7.6
1.7	0	1.1	1.2	–	–	–	1.3	(1.6)	1.7–2.3	2.3–2.5	2.3–6.5	≥6.5
1.0	0	1.1	–	–	–	–	–	–	–	–	1.8–1.7	≥1.7

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Optics Letters