3.3.2 NanoScan for High-Power Beam Applications
Photon’s High-Power NanoScan can measure focused CO2 laser
beams up to 5 kilowatts. The High-Power NanoScan is equippedwith a pyroelectric detector with copper slits and drum. A cooling
fan mounted on the scan head body provides additional heatmanagement. With the new “peak connect” algorithm and the software
controlled variable scan speed, the High-Power NanoScan is ideal formeasuring lasers operating with pulse width modulation (PWM) powercontrol. Measurement of Q-switched lasers and other higher frequency
pulsed lasers is also possible using this feature.

High-Power NanoScan
with cooling fan

What Can be Measured?

Photon’s High-Power NanoScan is designed to measure “high-power”
laser beams that were previously impossible to measure with standard NanoScan products. High-Power is a fairly indistinct term thatmeans different things in different contexts. For our purposes, “high-power” is defined as between 100W and 5000W, however the HighPower NanoScan will not be able to measure this power range for all wavelengths. High-Power laser beams are handled by using reflective
materials, and the level of reflectivity, and thus its inverse, absorption, are dependent on the wavelength of the laser light.

Measuring high-power beams can be tricky. The lasers have the potential to damage the scan head, and any reflected light canbe dangerous to both the operator and the surroundings. The High-Power NanoScan can measure these beams because it uses acombination of highly reflective components with high thermal dissipation capability. It is important to manage the reflected beam sothat it neither reenters the laser cavity nor sends stray beams into the surrounding area.
The High-Power NanoScan scan head has been shown to be able to handle power densities of 3.2MWcm-² at 10.6μm, the power density of
a 200μm beam at 1kW. At the shorter wavelengths of the other common industrial lasers, Nd:YAG and DPSS, the upper limits are little less,due to the slightly lower reflection of the components at wavelengths around 1000nm. Visible and UV lasers can also be measured, butthese will have lower limits yet.
Consult the damage thresholds charts found in the manual before placing an order or exposing any NanoScan slit profiler to alaser beam.

High-Power NanoScan Configurations
Detector TypePower Range

Wavelength

Aperture

Slits

Scan Head Size

Pyroelectric~1W - ~5W
upper limit
dependent on
wevelength~1W - ~5W
upper limit
dependent on
wevelength

190nm - >
100μm

9mm

5μm

100mm

190nm - >
100μm

20mm

10μm

100mm

Pyroelectric
Large Aperture

3.3.2 Beam Profile

In general the long infrared wavelengths, such as that of the carbon dioxide laser at 10.6microns, are highly reflective. These allow for
the highest power measurements up to the maximum levels of several kilowatts. When measuring these lasers and power levels theprinciple concern is the heat buildup in the scan head. The surfaces of the measurement drum and slits are better than 98% reflective tothis wavelength, and thus only 2% of the incident power will be absorbed by the scanhead and heat it up. Nonetheless, at 5000W thisrepresents a heat load of 100W that will raise the temperature of the internal components, which may cause damage to the detector andencoder electronics. The High-Power NanoScan is designed to be used for short-term measurements at these power levels. The beam
should only be incident on the scan head for a few seconds. The software is equipped with a record mode that makes it easy to make ashort measurement and then review the data while the scanhead is allowed to cool down.

159
For latest updates please visit our website: www.ophiropt.com/photonics

12.07.2012

Ordering Information - High-Power NanoScan
All High-Power NanoScan Systems Include: Fan cooled scanhead. For use at wavelengths from 200nm to greater than 20μm. Maximum
power capacity is dependent on wavelength and spot size. Refer to operating space charts for more information.
Slits and scan drum are highly reflective and user must send reflected energy into appropriate dump. A direct back reflection may cause
laser cavity to oscillate or if not properly directed may cause damage. User must handle all back-reflected energy from laser.
Measurements include: spot size, position and position difference information and laser profiles. Includes “peak connect” and software
control of scan speed for measurement of pulsed and pulse width modulated (PWM). Software includes ability to capture and record
bursts of data (Active X is optional with Pro Version).
USB 2.0 Controller allows NanoScan to interface to USB 2.0 port of laptop or desktop PC.

Item
USB HP-NS-PYRO/9/5-STD

Description
High-Power NanoScan scanhead with 9mm Pyroelectric Detector 5μm slits for use with higher power
beams.
High-resolution profiler featuring pyroelectric detector, 100mm diameter scanhead with rotation mountand matched pair of 5-μm wide slits. Use to measure spots 20μm and larger (1/e2 diameter) directly.
Works with CW and pulsed beams with rates greater than 2kHz. Actual minimum pulse rate is dependent
on beam size and scan rate. USB
Software includes automation feature.

USB HP-NS-PYRO/9/5-PRO

P/N
PH00399

PH00028

High-Power NanoScan scanhead with 9mm Pyroelectric Detector 5μm slits for use with higher power
beams.

USB HP-NS-PYRO/20/10-STD

3.3.2 Beam Profile

USB HP-NS-PYRO/20/10-PRO

High-resolution profiler featuring pyroelectric detector, 100mm diameter scanhead with rotation mountand matched pair of 5-μm wide slits. Use to measure spots 20μm and larger (1/e2 diameter) directly.
Works with CW and pulsed beams with rates greater than 2kHz. Actual minimum pulse rate is dependent
on beam size and scan rate. USB
High-Power NanoScan scanhead with 20mm Pyroelectric Detector 10μm slits for use with higher power
beams.

High-resolution profiler featuring pyroelectric detector, 100mm diameter scanhead with rotation mount,
20 mm entrance aperture, and matched pair of 10-μm wide slits. Can measure spots 50 μm and larger (1/e2 diameter) directly. Works with CW and pulsed beams with rates greater than 2kHz. Actual minimum
pulse rate is dependent on beam size and scan rate. USB
Software includes automation feature.
PH00027
High-Power NanoScan scanhead with 20mm Pyroelectric Detector 10μm slits for use with higher power
beams.

NH-HP-NS/9/5-STD
NH-HP-NS/9/5-PRO
NH-HP-NS/20/10-STD
NH-HP-NS/20/10-PRO

High-resolution profiler featuring pyroelectric detector, 100mm diameter scanhead with rotation mount,
20 mm entrance aperture, and matched pair of 10-μm wide slits. Can measure spots 50 μm and larger (1/e2 diameter) directly. Works with CW and pulsed beams with rates greater than 2kHz. Actual minimum
pulse rate is dependent on beam size and scan rate. USB
Head only High-Power NanoScan 9mm aperture 5µm slits
Head only High-Power NanoScan 9mm aperture 5µm slits
Head only High-Power NanoScan 20mm aperture 10µm slits
Head only High-Power NanoScan 20mm aperture 10µm slits

16012.07.2012

PH00398

For latest updates please visit our website: www.ophiropt.com/photonics

PH00415PH00044PH00414PH00043