General Characteristics

Ascend 60 Ascend 40
Wavelength 527 nm
Average Power 1 kHz
5 kHz
10 kHz
>35 W
>60 W
>50 W
>25 W
>40 W
>30 W
Pulse Energy 1 kHz
5 kHz
10 kHz
>35 mJ
>12 mJ
>5 mJ
>25 mJ
>8 mJ
>3 mJ
Nominal Repetition Rate 1-10 kHz

Beam Characteristics

Ascend 60 Ascend 40
Spatial Mode Multimode
Polarization Linear, Horizontal
Beam Diameter 3 mm (nominal)
Power Stability (over 8 hours at stable temperature) <0.15% rms
Beam Pointing Stability <10 µrad/°C

Electrical/Mechanical Specifications

Ascend 60 Ascend 40
Electrical Requirements 110/230 VAC, single phase, 60/50 Hz, 2 x 15/10 A
Laser Head Dimensions 20 x 10 x 7.1 in (50.8 x 25.4 x 17.9 cm)
Laser Head Weight 40 lbs (18 kg)
Power Supply Dimensions Rack mountable, 18 x 19 x 7 in (45.47 x 48.26 x 17.53 cm)
Power Supply Weight 30 lbs (14 kg)
Power Cable Length Umbilical - 2.95 m


  1. Due to our continuous improvement program, specifications are subject to change without notice.
  2. The Ascend is a Class IV - High-Power Laser, whose beam is, by definition, a safety and fire hazard. Take precautions to prevent exposure to direct and reflected beams. Diffuse as well as specular reflections can cause severe skin or eye damage.


Ultra-efficient Cooling

Ascend is based upon proprietary technology that employs an ultra-efficient cooling scheme to provide maximum stability and long-term reliability. When used for pumping a Spectra-Physics amplifier, Ascend is the most reliable, most efficient and lowest noise pump laser available.

Easily Changed Configurations

Ascend configurations can be to maximize the utility of your amplifier system. The Ascend flexibility means you can design experiments anywhere in the 1 to 10 kHz repetition rate range. Ascend is available in >60 W and >40 W output power levels to support your specific amplifier system configuration and requirements.

Industrial Reliability With Leading-edge Performance

Ascend continues Spectra-Physics’ long-standing commitment to producing the highest performing, most reliable diode-pumped solid state lasers. Ascend combines industrial reliability and ruggedness with leading-edge performance to maximize the performance of your Spectra-Physics ultrafast amplifier.

Compatible Power Sensors

To verify and analyze the output power of your Ascend laser, we recommend the Ophir 50A-PF-DIF-18 (7Z02738) thermal power sensor and Centauri laser power meter.  Additional information on this laser measurement equipment can be found on the ophiropt.com website.  Other Ophir sensors and meters may also be suitable for the Ascend, depending on application. Ophir also works with laser system developers to achieve embedded beam diagnostics to monitor system performance as an OEM solution.