Anomalous behavior of optogalvanic signal in a miniature neon discharge lamp

Saini, V. K.; Shrivastava, V.; Khare, R.

doi:10.1016/j.optcom.2007.08.066

Cited by 8 publications

(2 citation statements)

References 31 publications

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“…In brief, a ML simply consists of two parallel wires as electrodes made of inexpensive (Cu-Fe-Ni) alloy. Copper (Cu), iron (Fe), and nickel (Ni) are present in the ratio of 7.17∶42.48∶50.35, respectively [9]. Alloys for electrodes are preferred over pure metals with respect to their strength, ductility, and resistance to corrosion.…”

Section: Methodsmentioning

confidence: 99%

“…In general, hollow cathode lamps as good atomic vapor sources are used to study the OG effect by virtue of their low galvanic noise and enlarged negative glow region. However, a strong OG effect can be observed in simple miniature neon discharge lamps [9,10]. There is a major difference in the discharge geometry between hollow cathode and miniature neon lamps (MLs).…”

Section: Introductionmentioning

confidence: 99%

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Laser-induced optogalvanic signal oscillations in miniature neon glow discharge plasma

Saini

2013

Appl. Opt.

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Laser-induced optogalvanic (OG) signal oscillations detected in miniature neon glow discharge plasma are investigated using a discharge equivalent-circuit model. The damped oscillations in OG signal are generated when a pulsed dye laser is tuned to a specific neon transition (1s5→2p2) at 588.2 nm under the discharge conditions where dynamic resistance changes its sign. Penning ionization via quasi-resonant energy transfer collisions between neon gas atoms in metastable state and sputtered electrode atoms in ground state is discussed to explain the negative differential resistance properties of discharge plasma that are attributed to oscillations in the OG signal. The experimentally observed results are simulated by analyzing the behavior of an equivalent discharge-OG circuit. Good agreement between theoretically calculated and experimental results is observed. It is found that discharge plasma is more sensitive and less stable in close vicinity to dynamic resistance sign inversion, which can be useful for weak-optical-transition OG detection.

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%