General Specifications

type of instrument

free-beam based room temperature optics head coupled to low temperature objective and ultra-high tr

sensor head specifics

unique low temperature compatible achromatic objectives with high numerical aperture, optimized for

Confocal Unit


compact and modular design, two or more optical channels, standard configuration: 1 excitation chann

key benefits

quick and reliable alignment of each channel, steering mirror for the combined beams exceptional lon

quick-exchange of optical components

beamsplitters, filter mounts for up to 4 filters/ polarizers (1" diameter), optional piezoelectric r

pinhole configuration

two pinholes (fiber apertures), different illumination and collection wavelength possible

pinhole size

dependent on fibers, typically 3 .. 9 µm mode field diameter

compatible LT-objective

LT-APO/VIS, LT-APO/VISIR, LT-APO/NIR(see accessory section for more information)

inspection unit

sample imaging with large field of view: ~54 µm (attoDRY), ~40 µm (attoLIQUID)


excitation wavelength range

400 .. 1000 nm, default 532 nm (others on request)

illumination port specification

FC/ APC-connector for single mode fibers or free-beam configuration

light source

dedicated Raman laser, single mode fiber coupled

light power on the sample

typically 1 pW..10mW

optical filter

laser line filter


detection mode

2D Raman images, time and single point Raman spectra


ultra-high transmission spectrometer, f=300 mm

total optical transmission

greater 60% at 532 nm


dichroic mirror & edge filter for signal detection as close as 90 cm-1 to the laser line


typ. 600/mm and 1800/mm grating

spectral resolution

1 cm-1 at 1800/mm grating

CCD camera

back-illuminated CCD, peltier-cooled to -60 °C at 20 °C room temperature, 1024x127 pixels, 90% quant

Sample Positioning

total travel range

5 x 5 x 5 mm³ (open loop)

step size

0.05..3 µm @ 300 K, 10..500 nm @ 4 K

fine scan range

50 x 50 µm² @ 300 K, 30 x 30 µm² @ 4 k (open loop)

sample holder

ASH/QE/0 quick exchange sample holder and integrated heater with calibrated temperature sensor

Suitable Operating Conditions

temperature range

1.5 K..300 K (dependent on cryostat); mK compatible setup available on request

magnetic field range

0..15 T+ (dependent on magnet)

operating pressure

designed for He exchange gas (vacuum compatible version down to 1E-6 mbar on request)

Suitable Cooling Systems

titanium housing diameter

48 mm

bore size requirement

designed for a 2" (50.8 mm) cryostat/magnet bore

compatible cryostats

attoDRY1000/1100/2100, attoLIQUID1000/2000 (attoLIQUID3000/5000 on request)

Compatibility with Electronics

scan controller and software

dedicated FPGA-based RAMAN controller providing coarse positioning and scanning signals for sample p

Options and Upgrades

in-situ inspection optics

incl. with CFM I external optics head

closed loop upgrade for coarse positioners

resistive encoder, range 5 mm, sensor resolution approx. 200 nm, repeatability 1-2 µm

sample holder upgrade

ASH/QE/4CX quick-exchange sample holder with 8 electrical contacts and integrated heater with calibr

Voigt geometry upgrade

Voigt-IWDO objective, ASH/QE/4CX/CFM sample holder with 8 electrical contacts for Voigt & Faraday ge




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