Singlet oxygen generator using a porous pipe

Takehisa, Kiwamu; Shimizu, N.; Uchiyama, Taro

doi:10.1063/1.338802

Cited by 10 publications

(2 citation statements)

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“…7,8) In 1985-1995, Uchiyama et al developed an experimental laser apparatus using chemically generated O 2 ( 1 Δ g ). 1,[9][10][11] A laser oscillator with a 6-m cavity was developed using a high-pressure O 2 ( 1 Δ g ) generator (SOG) 12,13) Unfortunately laser oscillation was not successful due to the scattering losses by water aerosols which are transported from the SOG and/or formed from transported water vapor. 1), 11) Another reason was that the cavity was not long enough considering other optical losses.…”

Section: Introductionmentioning

confidence: 99%

New concepts of realizing a chemical oxygen laser

Takehisa¹

2014

SPIE Proceedings

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New concepts are presented to realize a chemical oxygen laser (COL) based on the transition from O 2 ( 1 Δ g ) to O 2 ( 3 Σ g ).The chemical oxygen iodine laser (COIL) utilizes the energy transfer from the chemically generated O 2 ( 1 Δ g ) to iodine I ( 2 P 3/2 ) because the stimulated emission cross section of O 2 ( 1 Δ g ) is too small to give a direct oscillation. But since extractable laser energy has no relation to the stimulated emission cross section, a COL has a potential to produce a high energy laser output if it has a long enough active medium to give a positive gain. The intrinsically long upper-state life time enables the storage of large energy, which has a potential give a giant pulsed laser. Since the previous report elucidated the problems 1) , the proposed concepts are based on the consideration of them. Also a Q switched COL oscillator is simulated with a rate equation. The simulation results show that a giant pulse of ~0.05ms width can be obtained with the extraction efficiency of 10-20%.

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Section: Introductionmentioning

confidence: 99%

New concepts of realizing a chemical oxygen laser

Takehisa¹

2014

SPIE Proceedings

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“…In the COIL, singlet delta oxygen transfers its energy to atomic iodine which lases as its atoms release energy. The performance of a COIL depends on the ability to produce 02(1 8) generated from its singlet oxygen generator (Takehisa et al, 1987).…”

Section: Introductionmentioning

confidence: 99%