Specifications
attoRAMAN
General Specifications
type of instrument free-beam based room temperature optics head coupled to low temperature objective and ultra-high
transmission spectrometer
sensor head specifics unique low temperature compatible achromatic objectives with high numerical aperture, optimized for
different wavelength ranges
Confocal Unit
configuration compact and modular design, two or more optical channels
standard configuration: 1 excitation channel,1 detection channel
quick-exchange of optical components beamsplitters, filter mounts for up to 4 filters/ polarizers (1" diameter), optional piezoelectric rotator
with filter mount
LT- compatible 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: ~75 μm (attoDRY), ~56 μm (attoLIQUID)
Illumination
excitation wavelength range 400 .. 1000 nm
default: 532 nm (others on request)
light source dedicated Raman laser, single mode fiber coupled
light power on the sample typically 1 pW..10mW
optical filter laser line filter
Detection
detection mode 2D Raman images, time and single point Raman spectra
spectrometer ultra-high transmission spectrometer, f=300 mm
total optical transmission greater 60% at 532 nm
filters dichroic mirror & edge filter for signal detection as close as 90 cm-1 to the laser line
gratings 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% quantum
efficiency at 532 nm, 100 kHz readout converter
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)
Complete microscope stick attoRAMAN