[Laser Quantum]
venteon optics

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Description

Laser Quantum’s venteon optics range of mirrors, wedges and splitters are designed specifically for beam path control and Group Velocity Dispersion (GVD) compensation of few-cycle laser pulses.

Specification

Range of products

DCM mirror pairs

The DCM products are dispersion compensating mirror pairs used for the compensation of positive dispersion affecting femtosecond laser pulses (Fig. 1 to 8). The unique design enables reflectivity greater than 99% over the whole supported spectral bandwidth next to a defined negative dispersion. Using these mirrors in a pulse compressor in combination with CaF2 wedges pair/glass material it is possible to compress the pulses nearly to the supported transform limit according to the lasers spectral bandwidth.

Compared to other methods used for GVD compensation, the use of high damage-threshold DCM mirrors results in a compact and robust designs for ultra-short pulse laser oscillators or compressor setups with octave-spanning spectral bandwidth. This can be achieved with a minimum of optical components and without complex and often narrow-band and inefficient prism or grating sequences.

 

DCM7

DCM9

DCM10

DCM11

Wavelength Range:

600-1200nm

450-950nm

500-850nm

650-1050nm

Coating S1

HR>99.6%

@ 600-1200nm

GDD

-120fs2/pair

@ 800nm

HR>99.6%

@ 450-950nm

GDD

-60fs2/pair

@ 700nm

HR>99.6%

@ 480-870nm

GDD

-100fs2/pair

@ 650nm

HR>99.8%

@ 650-1050nm

GDD

-130fs2/pair

@ 800nm

Substrate

FS, UV-grade, λ/10

AOI

0-10o

Dimensions

Rectangular: 35x20mm Thickness: 10mm

Rectangular: 35x20mm Thickness: 6.35mm

Rectangular: 35x20mm Thickness: 10mm

Rectangular: 35x20mm Thickness: 10mm

ROC

flat

 

Enhanced Silver Mirrors

This protected silver mirror is enhanced for femtosecond applications and tested for sub-5fs pulses. It features an average reflectivity of more than 99% between 600nm and 1200nm (0-45°) (Fig. 9) and a tailored flat dispersion characteristic in this range. Using this type of mirror for steering few cycle pulses, the applicable pulse energy will no longer be significantly reduced by using several bounces giving you more freedom in designing your experimental setup.

 

Enhanced Silver Mirrors

Wavelength Range

585-1500nm

Coating S1

Rave>99%

@600-1200nm

GDD(R) <±10fs2

@650-1150nm

AOI

0-45o

Polarisation

P & s polarised light

Substrate

FS (UV-grade) or BK7, λ/10

Dimensions

Dia: ½” (12.7mm)

Thickness: 6.35mm

Dia: 25mm

Thickness: 6.35mm

 

Beam Splitter with balanced dispersion

The Laser Quantum all-dielectric beam splitters feature a constant splitting ratio for an ultra-broadband wavelength range and a balanced dispersion in transmission and reflection. Therefore these components are ideally suited for femtosecond applications where a precise control of reflectivity and dispersion is required over a wide spectral range. Transmission and reflection properties of this beam splitter are designed to be identical and thus perfect for dispersion-balanced interferometers or auto correlators

 

Beam Splitter with balanced dispersion

Split Ratio

50% ±5% (identical group delay)

Wavelength Range

600-1500nm

Substrate

FS (UV grade)

Dimensions

Dia: 1” (25.4mm)

Thickness: 0.7mm

 

Glass wedges for dispersion fine tuning

The glass wedge pairs allow for dispersion fine tuning and optimal pulse compression in combination with dispersion compensating mirrors. The dispersion characteristics of the DCM mirrors are especially designed to work together with specific glass materials and thus such a wedge pair can be used to fine-tune the dispersion and compress pulses for the desired application.

 

Glass wedges for dispersion fine tuning

Material

CaF2

Fused Silica

Fused Silica

Centre Thickness

1.4mm

2.0mm

Wedge dimensions

35 (W) x 20 (H)mm

50 (W) x 25 (H)mm

Wedge angle

4o

Surface

<λ/6

<λ/10 or <λ

<λ/4

Coating

Uncoated (for use under Brewster angle)

 

Mechanics

Specialised mirror mounts, wedge mounts, beam splitter adapters and periscopes are available on request

 


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