Del Mar Photonics - Product brochures

Del Mar Photonics supplied Femtosecond Third Harmonic Generation for amplified Ti:Sapphire laser to Air Force Institute of Technology.

Third harmonic generator (THG) is developed for frequency doubling and tripling of Ti-Sa amplifier radiation (λ=780-820 nm). Device is based on second harmonic generation (SHG) and sum-frequency generation (SFG) techniques and provides stable radiation in fs scale. TH generator is developed for high conversion efficiency.

Femtosecond third harmonic generation for amplified Ti:sapphire laser - THG brochure - THG manual - Request a quote

Pulse width - 40-60 fs
TH efficiency - > 7 %*
SH efficiency - >25 % (full output**)
Input beam size (FWHM) - 2.7 mm ***
Input energy in pulse > 8 μJ
Temporal broadening - For TH pulse< 250 fs
For SH pulse <100 fs
Input polarization - Linear- horizontal
Output TH polarization - Linear- horizontal
Output SH polarization - linear- vertical
Output fundamental
beam polarization
- linear- vertical
Input wavelength - 780 820 nm
Output TH wavelength - 260 274 nm
Output SH wavelength - 390 410 nm
Dimensions - 500mm x 362mm x 188mm

* - assuming that pulse is compressed;
** - just after the flip-mirror M7;
*** - assuming that 1.5<M2<2.

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Customer inquiry:

Im interested in the 3rd harmonic generator for an amplified Ti:sapphire laser. What is the maximum pulse energy? The system is a regenerative amplifier that produces 750 mW at a repetition rate of 100 kHz, which is a pulse energy of 7.5 microjoules in 50 femtoseconds. The beam diameter is 2.7 mm. We have tried to use a Coherent 9300 harmonic system, but it is designed for oscillator energies of nanojoules, so it is too tightly focused on the crystal and generates white light.

Del Mar Photonics:

We can offer about 7-8% efficiency, the version for 8 uJ will be non-standard. Please find enclosed the quotation for the TH generator along with
the drawing. Please note that since the unit is non-standard the dimensions may be extended by +100 mm in length and +50 mm in width.


ATsG800 Third Harmonic Generator
Second and third harmonic outputs
Input wavelength for TH 750-900 nm
Input wavelength for SH 710-960 nm
Input pulse width - >20 fs
Conversion efficiency for TH 7-8% (depends on input parameters)
Conversion efficiency for SH >30% (depends on input parameters)
Pulse broadening - <150 fs
Input pulse energy 8 μJ

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