WO2006048541A1 - Dispositif de controle programmable de l'amplitude et de la phase spectrale d'impulsions lumineuses issues d'un melangeur optique - Google Patents
Dispositif de controle programmable de l'amplitude et de la phase spectrale d'impulsions lumineuses issues d'un melangeur optique Download PDFInfo
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- WO2006048541A1 WO2006048541A1 PCT/FR2005/002705 FR2005002705W WO2006048541A1 WO 2006048541 A1 WO2006048541 A1 WO 2006048541A1 FR 2005002705 W FR2005002705 W FR 2005002705W WO 2006048541 A1 WO2006048541 A1 WO 2006048541A1
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- WO
- WIPO (PCT)
- Prior art keywords
- amplitude
- pulses
- phase
- optical
- signals
- Prior art date
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- 230000003287 optical effect Effects 0.000 title claims abstract description 34
- 230000003595 spectral effect Effects 0.000 title claims abstract description 18
- 230000003993 interaction Effects 0.000 claims abstract description 16
- 239000013078 crystal Substances 0.000 claims description 20
- 238000006243 chemical reaction Methods 0.000 claims description 8
- 239000000203 mixture Substances 0.000 claims description 4
- 239000006185 dispersion Substances 0.000 claims description 2
- 239000004606 Fillers/Extenders Substances 0.000 abstract 2
- 238000000034 method Methods 0.000 description 5
- 238000007493 shaping process Methods 0.000 description 5
- 230000002123 temporal effect Effects 0.000 description 5
- 230000007423 decrease Effects 0.000 description 3
- 239000011521 glass Substances 0.000 description 2
- 230000003321 amplification Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000001934 delay Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 230000001172 regenerating effect Effects 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/35—Non-linear optics
- G02F1/39—Non-linear optics for parametric generation or amplification of light, infrared or ultraviolet waves
Definitions
- the present invention relates to a device for the programmable control of the amplitude and the spectral phase of light pulses from an optical mixer.
- pulse laser sources make it possible to obtain a wide variety of different wavelengths by non-linear optical methods.
- a source of wavelength ⁇ interacting in a nonlinear crystal will produce a light beam of wavelength half ⁇ / 2 by frequency doubling.
- the elongation of the pulses will reduce the instantaneous optical power of these and will therefore decrease the efficiency of the non-linear interaction.
- Such an approach will therefore only be effective in a configuration allowing a high conversion efficiency despite the increase in the duration of the pulses.
- the conversion efficiency of non-linear interactions is strongly determined by a phase agreement condition between the two incident beams and the resulting beam.
- the mixture of two optical signals Ei and E 2 in a nonlinear optical crystal to obtain an output signal E 3 whose frequency ⁇ 3 is the sum or the difference of the frequencies ⁇ i and ⁇ 2 of the signals Ei and E 2 is truly effective only when the signals Ei and E 2 are signals with a very narrow spectral band, or even signals with pure frequency.
- the invention therefore more particularly aims to eliminate this drawback.
- the present invention consists in associating a method of indirect temporal shaping with an extension technique which preserves the phase agreement in a large spectral width.
- a programmable controller Pi for controlling the amplitude and the phase of the signals coming from the above pulse stretchers Si, S 2 , and
- a compressor C of the pulses from said optical mixture M At the output of the above optical mixer M a compressor C of the pulses from said optical mixture M.
- a second programmable controller P 1 , P 2 for controlling the amplitude and the phase of the signals originating from the above pulse stretchers S 1 , S 2 is inserted on the second channel V 1 , V 2 .
- the aforesaid stretchers Si, S 2 of the short broadband pulses generate long pulses modulated in frequency of essentially identical duration and at least ten times greater than the minimum duration of the brief pulses, to allow both the approached maintenance of the phase matching in a wide bandwidth and programming the amplitude and phase of the pulses from the mixer.
- the ratio of the spectral bands of the signals generated by the above-mentioned laser sources Li, L 2 , and the sign of the slopes of the frequency modulated signals from the stretchers are determined by the mixing crystal and its orientation in order to optimize the efficiency of conversion of this mixing crystal in a very wide bandwidth.
- the aforesaid programmable controllers Pi, P 2 for controlling the amplitude and the phase of the signals coming from the aforesaid pulse stretchers Si, S 2 , could be:
- AOPDF - programmable dispersive acousto-optical filters
- Optical delay lines with zero dispersion comprising an intermediate focal plane in which is placed a device for spatial phase and / or amplitude control.
- FIG. 1 is a schematic representation of the device according to the invention
- FIG. 2 is a schematic representation of the device according to the invention intended for a first example of application
- FIG. 1 is a schematic representation of the device according to the invention
- FIG. 2 is a schematic representation of the device according to the invention intended for a first example of application
- Figure 3 is a schematic representation of the device according to the invention for a second application example.
- two laser sources L 1 and L 2 generate short pulses E 1 (T) and E 2 (t) of central optical frequencies Co 1 and ⁇ 2 ,
- an optical mixer M consisting of a thick non-linear optical crystal, performs the collinear interaction of the signals E “i (t) and E" 2 (t) coming from the programmable control devices Pi and P 2 , and
- a compressor C compresses the pulses E 3 (t) of output from the mixer M; the optical frequency ⁇ 3 of these pulses E 3 (t) being given by:
- the above blocks Li, Si, Pi, constitute the path Vi; the above blocks L 2 , S 2 , P 2 , constitute the path V 2 .
- the above laser sources Li and L 2 generate brief pulses which are written:
- Ai (t) and A 2 (t) being the temporal amplitudes of these pulses of duration ⁇ ⁇ and
- A'i (t) and A ' 2 (t) being the temporal amplitudes of the elongated pulses, frequency modulated with duration Ti and T 2 .
- Hi (t / ⁇ i) and H 2 (t / ⁇ 2 ) are the impulse responses, in amplitude and in phase, of the programmable controllers Pi and P 2 , generated by electrical signals Hi (t) and H 2 (t) applied to programmable controllers, ai and ⁇ 2 being scaling factors, and ⁇ S> the convolution product.
- an optical amplifier of regenerative or multi-pass type ARO is placed after the programmable controller P 2 and before a doubling crystal CR (of generation of 2 nd harmonics).
- Channel V 1 consists of a stretcher Si and a programmable controller Pi.
Landscapes
- Physics & Mathematics (AREA)
- Nonlinear Science (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Optical Modulation, Optical Deflection, Nonlinear Optics, Optical Demodulation, Optical Logic Elements (AREA)
- Lasers (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR0411703 | 2004-11-03 | ||
FR0411703A FR2877444B1 (fr) | 2004-11-03 | 2004-11-03 | Dispositif de controle programmable de l'amplitude et de la phase spectrale d'impulsions lumineuses issues d'un melangeur optique |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2006048541A1 true WO2006048541A1 (fr) | 2006-05-11 |
Family
ID=34954068
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/FR2005/002705 WO2006048541A1 (fr) | 2004-11-03 | 2005-10-27 | Dispositif de controle programmable de l'amplitude et de la phase spectrale d'impulsions lumineuses issues d'un melangeur optique |
Country Status (2)
Country | Link |
---|---|
FR (1) | FR2877444B1 (fr) |
WO (1) | WO2006048541A1 (fr) |
-
2004
- 2004-11-03 FR FR0411703A patent/FR2877444B1/fr active Active
-
2005
- 2005-10-27 WO PCT/FR2005/002705 patent/WO2006048541A1/fr active Application Filing
Non-Patent Citations (7)
Title |
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DATABASE INSPEC [online] THE INSTITUTION OF ELECTRICAL ENGINEERS, STEVENAGE, GB; January 2000 (2000-01-01), VERLUISE F ET AL: "Arbitrary dispersion control of ultrashort optical pulses with acoustic waves", XP008048946, Database accession no. 6478837 * |
DATABASE INSPEC [online] THE INSTITUTION OF ELECTRICAL ENGINEERS, STEVENAGE, GB; May 1996 (1996-05-01), BOSCHERON A C L ET AL: "Efficient broadband sum frequency based on controlled phase-modulated input fields: theory for 351-nm ultrabroadband or ultrashort-pulse generation", XP008049028, Database accession no. 5282958 * |
JOURNAL OF THE OPTICAL SOCIETY OF AMERICA B (OPTICAL PHYSICS) OPT. SOC. AMERICA USA, vol. 13, no. 5, May 1996 (1996-05-01), pages 818 - 826, ISSN: 0740-3224 * |
JOURNAL OF THE OPTICAL SOCIETY OF AMERICA B (OPTICAL PHYSICS) OPT. SOC. AMERICA USA, vol. 17, no. 1, January 2000 (2000-01-01), pages 138 - 145, ISSN: 0740-3224 * |
RIBEYRE K ET AL: "ALL-OPTICAL PROGRAMMABLE SHAPING OF NARROW-BAND NANOSECOND PULSES WITH PICOSECOND ACCURACY BY USE OF ADAPTED CHRIPS AND QUADRATIC NONLINEARITIES", OPTICS LETTERS, OPTICAL SOCIETY OF AMERICA, WASHINGTON, US, vol. 26, no. 15, 1 August 2001 (2001-08-01), pages 1173 - 1175, XP001110589, ISSN: 0146-9592 * |
WITTE T ET AL: "Programmable amplitude- and phase-modulated femtosecond laser pulses in the mid-infrared", OPTICS LETTERS 15 JAN. 2002 OPT. SOC. AMERICA USA, vol. 27, no. 2, 15 January 2002 (2002-01-15), pages 131 - 133, XP002333417, ISSN: 0146-9592 * |
ZEIDLER D ET AL: "Optical parametric amplification of a shaped white-light continuum", OPTICS LETTERS 1 DEC. 2001 OPT. SOC. AMERICA USA, vol. 26, no. 23, 1 December 2001 (2001-12-01), pages 1921 - 1923, XP002333416, ISSN: 0146-9592 * |
Also Published As
Publication number | Publication date |
---|---|
FR2877444B1 (fr) | 2007-01-26 |
FR2877444A1 (fr) | 2006-05-05 |
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