| Model |
1035-40-40 |
1035-80-60 |
1035-150-150 |
| Wavelength (nm) |
1035 ± 5 |
1035 ± 5 |
1035 ± 5 |
| Output power (W) |
40 |
60 |
150 |
| Energy (µJ) |
40 at 1 MHz |
80 at 750 kHz |
150 |
| Repetition rate |
Single shot to 1MHz or 1 to 50 MHz without AOM |
Single shot up to 1MHz or 1 to 50 MHz without AOM |
Single shot up to 1MHz or 1 to 50 MHz without AOM |
| Pulse length tuning |
10 ps |
10 ps |
up to 10 ps |
| Beam profile |
TEM00, M2 < 1.2 |
TEM00, M2 < 1,2 |
<1.3 |
| Beam divergence (mrad) |
<1 |
<1 |
<1.0 |
| Beam diameter (mm, 1/e2) |
2,7 ± 0,3 |
2,7 ± 0,3 |
3.0 ±0.3 (1/e²) |
| Power stability (RMS, %) |
<1,5 |
<1,5 |
<2 |
| Model |
517-20-20 |
517-40-30 |
345-20-25 |
345-38-30 |
| Wavelength (nm) |
517 ± 5 |
517 ± 5 |
345 ± 2 |
345 ± 2 |
| Output power (W) |
20 |
30 |
25 |
30 |
| Energy (µJ) |
20 at 1 MHz |
40 at 750 kHz |
20 at 1.25 MHz |
37.5 at 800 kHz |
| Repetition rate |
Single shot up to 4 MHz |
| Pulse length tuning |
Custom pulse length range can be optimized |
Custom pulse length range can be optimized |
NA |
NA |
| Beam profile |
TEM00, M2 < 1.2 |
TEM00, M2 < 1.2 |
TEM00, M2 < 1,3 |
TEM00, M2 < 1,3 |
| Beam divergence (mrad) |
<1 |
<1 |
≤0.25 |
≤0.25 |
| Beam diameter (mm, 1/e2) |
2,0 ± 0,2 |
2,0 ± 0,2 |
5.0 ±0.5 |
5.0 ±0.5 |
| Power stability (RMS, %) |
<1,5 |
<1,5 |
<3 |
<3 |
New laser development techniques
The so-called HALT(Highly Accelerated Life Testing) process has been applied to the laser development, which in practice means that the design as well as the development of prototypes involves demanding testing of individual laser components under extreme conditions and limit states until damage occurs. This leads already in the design and development section to the "catching of flies" and optimization of the whole system. By subjecting it to extreme conditions, the limits of the design and construction are tested. This process then significantly extends the lifetime of the laser and minimizes failure rates during operation.
For example, testing of the shutter led to design modifications and the resulting lifetime is now at least 10 million cycles. Another outcome of the testing is a cooling water circuit that can operate with 3 times the water pressure used. Last but not least, testing has led to the elimination of the need to adjust the optics inside the laser.
New laser manufacturing processes
All lasers are then subjected to the so-called HASS(Highly Accelerated Stress Screening) process before shipment, which is a very demanding output inspection according to international standards. This is an industrial method of product testing used in manufacturing to verify the functionality of a product and involves cyclically loading the product with high temperature changes and at the same time strong mechanical vibrations and shocks. Coherent performs these tests on every product that leaves the factory, over a temperature range of up to 50°C and an acceleration range of up to 10G. Laser parameters are checked both before and after the actual testing and must not be changed out of specification. This process then significantly eliminates system failure or damage due to mishandling during shipping.
Coherent is currently the only laser manufacturer in the world to have implemented these procedures in development and production. The advantage of the HALT and HASS processes is that they are world standards, which guarantee high reliability and longer product life for users, and for the manufacturer it reduces the cost of any warranty service and repairs.
