FR2303396A2 - Dynamic gas laser suitable for fighter aircraft - where combustion gases from jet engine are fed to optical resonator cavity - Google Patents

Dynamic gas laser suitable for fighter aircraft - where combustion gases from jet engine are fed to optical resonator cavity

Info

Publication number
FR2303396A2
FR2303396A2 FR7601590A FR7601590A FR2303396A2 FR 2303396 A2 FR2303396 A2 FR 2303396A2 FR 7601590 A FR7601590 A FR 7601590A FR 7601590 A FR7601590 A FR 7601590A FR 2303396 A2 FR2303396 A2 FR 2303396A2
Authority
FR
France
Prior art keywords
laser
gas
mixt
fuel
optical resonator
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
FR7601590A
Other languages
French (fr)
Inventor
Roland John Hill
Norman Thomas Jewell
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Rolls Royce PLC
Original Assignee
Rolls Royce PLC
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from US05/542,864 external-priority patent/US4013976A/en
Application filed by Rolls Royce PLC filed Critical Rolls Royce PLC
Publication of FR2303396A2 publication Critical patent/FR2303396A2/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
    • H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
    • H01S3/09—Processes or apparatus for excitation, e.g. pumping
    • H01S3/095—Processes or apparatus for excitation, e.g. pumping using chemical or thermal pumping
    • H01S3/0951—Processes or apparatus for excitation, e.g. pumping using chemical or thermal pumping by increasing the pressure in the laser gas medium
    • H01S3/0953—Gas dynamic lasers, i.e. with expansion of the laser gas medium to supersonic flow speeds

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Fluid Mechanics (AREA)
  • Engineering & Computer Science (AREA)
  • Plasma & Fusion (AREA)
  • Optics & Photonics (AREA)
  • Lasers (AREA)

Abstract

Parent Patent describe the production of a dynamic gas laser, esp. a CO2 laser, using a gas turbine engine in which one or more fuels are burnt in compressed air to obtain a gas mixt. with laser properties. The pressure of the gas mixt. is then reduced aerodynamically using a system of supersonic nozzles, which are followed by an optical resonator. The novelty in the present invention is that at least one fuel is a hydrocarbon used in an amt. sufficient to give an equivalence rate (E.R.) of the fuel/air mixt. immediately before combustion of 0.35-0.85, where E.R. = ratio fuel/ari of the gas mixt. stoichiometric ratio of the fuel/air in the gas mixt. Used e.g. on figther aircraft, where the combustion gases from a jet engine are used to supply a laser. With a total gas flow of 100 kg/second it is easy to draw off 10% contg. energy of 40 k W/kG/sec. to produce a laser with 100-200 kW output.
FR7601590A 1975-01-21 1976-01-21 Dynamic gas laser suitable for fighter aircraft - where combustion gases from jet engine are fed to optical resonator cavity Pending FR2303396A2 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US05/542,864 US4013976A (en) 1971-07-20 1975-01-21 Gas dynamic lasers

Publications (1)

Publication Number Publication Date
FR2303396A2 true FR2303396A2 (en) 1976-10-01

Family

ID=24165605

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7601590A Pending FR2303396A2 (en) 1975-01-21 1976-01-21 Dynamic gas laser suitable for fighter aircraft - where combustion gases from jet engine are fed to optical resonator cavity

Country Status (1)

Country Link
FR (1) FR2303396A2 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4403325A (en) * 1980-03-28 1983-09-06 Messerschmitt-Boelkow-Blohm Gesellschaft Mit Beschraenkter Haftung Gasdynamic CO2 laser and method for operating such a laser
CN115425510A (en) * 2022-11-07 2022-12-02 西南科技大学 Pyrotechnical laser ignited by compressed air

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA125198A (en) * 1910-02-08 1910-04-26 Gardiner, Robert M. Breech loading safety gun
FR2146427A1 (en) * 1971-07-20 1973-03-02 Rolls Royce

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA125198A (en) * 1910-02-08 1910-04-26 Gardiner, Robert M. Breech loading safety gun
FR2146427A1 (en) * 1971-07-20 1973-03-02 Rolls Royce

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
EXBK/71 *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4403325A (en) * 1980-03-28 1983-09-06 Messerschmitt-Boelkow-Blohm Gesellschaft Mit Beschraenkter Haftung Gasdynamic CO2 laser and method for operating such a laser
CN115425510A (en) * 2022-11-07 2022-12-02 西南科技大学 Pyrotechnical laser ignited by compressed air

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