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Coherent PowerLine L 400 (Nd:YAG) Laser Cleaning Parameters

PowerLine Series coherent.com (opens in new tab)

Coherent's L 400 carries Rofin's German diode-pumped Nd:YAG lineage into laser cleaning as a bulk-crystal OEM source, not another fiber marker. It spalls photovoltaic thin films and dielectric layers off glass, where its 30 mJ, 429 kW pulses lift coatings fiber heads leave behind. Water cooling and 325 W separate it from the line's air-cooled fiber siblings, buying single-pulse energy for silicon carbide conditioning and thick-scale removal.

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Published values come from public manufacturer datasheets and product pages. If you represent Coherent and see an error, outdated figure, or missing model, send a short correction with a public source URL and we will review it.

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OEM Laser Source Module

This is a laser source module sold to system integrators — not a complete laser cleaning machine. Specifications reflect the bare source only. End-user systems built on this module will vary in beam delivery, scan head, and enclosure.

Derived Parameters

Peak power429 kW
Fluence at 2 mm spot0.955 J/cm²
Fluence at 5 mm spot0.153 J/cm²
Overlap (cleaning)60–80%

Field spot diameter varies by scan head — 2 mm and 5 mm are representative values for handheld cleaning heads.

Derived from published specifications.

Canonical Specifications

Entity-fact-cited specifications for the Coherent PowerLine L 400 (Nd:YAG) sourced from the canonical machines entity registry. Each row is anchored to a citation.

Coherent PowerLine L 400 (Nd:YAG)High-Energy Q-Switched
Published specifications for Coherent PowerLine L 400 (Nd:YAG)
Max Power325 W[1],[2]
Pulse Energy30 mJ[1],[2]
Pulse Duration70 ns[1],[2]
Repetition Rate6–50 kHz[1],[2]
Beam Quality (M²)2[3]
Cooling MethodWater[4],[5]
Weight—

Sources

  1. The theory and application of nanosecond Laser surface treatment technology: A review journals.sagepub.com (opens in new tab)
  2. Research Progress and Challenges in Laser-Controlled Coating Removal pmc.ncbi.nlm.nih.gov (opens in new tab)
  3. M² Factor (Beam Quality Factor) — RP Photonics Encyclopedia rp-photonics.com (opens in new tab)
  4. Laser Cooling Units — RP Photonics Encyclopedia rp-photonics.com (opens in new tab)
  5. Guidance on Laser Safety Requirements (DOE EFCOG Laser Safety Community of Practice, 2023) efcog.org (opens in new tab)

Published Specifications

BrandCoherent
ModelPowerLine L 400 (Nd:YAG)
OriginGermany / USA
Laser typeQ-switched Nd:YAG DPSS
Wavelength1064 nm
Average power325 W
Max pulse energy30 mJ
Pulse width70 ns
Pulse frequency6–50 kHz
CoolingWater
Beam quality (M²)< 2

Source: https://www.coherent.com/machines-systems/laser-marking-engraving/powerline-series

Parameter ranges

Coherent PowerLine L 400 (Nd:YAG) positioned against other Coherent machines. Orange/blue = this model; slate band = Coherent min–max for that property. Missing properties are omitted.

Parameter rangesAvg Power325.0 WPulse Energy30.0 mJFrequency6.00 kHz50.0 kHzPulse Width70.0 nsPeak Power429.0 kWFluence @ 2 mm0.95 J/cm²Fluence @ 5 mm0.15 J/cm²Beam Quality M²2.00 Published datasheetCalculated from physicsCoherent range
Each row is scaled to the Coherent lineup max for that property (not a shared multi-unit axis). Validate against machine calibration before production use.

Fleet Power vs. Pulse Energy

Where the Coherent PowerLine L 400 (Nd:YAG) sits among 52 laser-cleaning machines with published power and pulse energy. Log-scale axes; shape = architecture; orange highlight = this machine.

Fleet Power vs. Pulse Energy104050801001602503206401.0k1.3k1.3k2.6k124581016253264100125128256Max Power (W)Pulse Energy (mJ)Netalux Jango®: 200 W, 100 mJcleanLASER CL1000iF: 1000 W, 10 mJPULSAR Laser SHARK P CL 100M: 100 W, 1.5 mJPULSAR Laser SHARK P CL 200M: 200 W, 1.5 mJPULSAR Laser SHARK P CL 300M: 300 W, 1.5 mJPULSAR Laser SHARK P CL 500A: 500 W, 1.5 mJPULSAR Laser SHARK P CL 1000A: 1000 W, 1.5 mJLaserax LXQ-UHP Series (500W–3kW): 1750 W, 100 mJ4JET JETLASER M200: 200 W, 10 mJ4JET JETLASER M500: 500 W, 100 mJ4JET JETLASER M1000: 1000 W, 100 mJSenFeng SF500HC: 500 W, 50 mJSenFeng SF1000HC: 1000 W, 50 mJHan's Laser HC-PD: 125 W, 1.5 mJP-Laser QF-500: 500 W, 50 mJP-Laser QF-1000: 1000 W, 100 mJP-Laser QF-2000: 2000 W, 100 mJPowerlase Vulcan 500c: 500 W, 40 mJPowerlase FL-C100C: 100 W, 5 mJJNCT Laser 100W Air Cooling Laser Cleaning Machine: 100 W, 1 mJJNCT Laser 200W Air Cooling Laser Cleaning Machine: 200 W, 1 mJWuhan Sintec STPL-V-i500C: 500 W, 60 mJWuhan Sintec STPL-V-i1600: 1600 W, 250 mJHan's Laser HC-PD 50W: 50 W, 1.1 mJHan's Laser HC-PD 100W: 100 W, 1.5 mJHan's Laser HC-PD 200W: 200 W, 1.5 mJNetalux Needle 100: 100 W, 1 mJNetalux Needle 150: 150 W, 1 mJNetalux Needle 200: 200 W, 2 mJNetalux Needle 300: 300 W, 2 mJcleanLASER CL 500: 500 W, 25 mJP-Laser QFC-50: 50 W, 1 mJP-Laser QFC-100: 100 W, 1 mJP-Laser QFC-200: 200 W, 1 mJP-Laser QFC-300: 300 W, 1 mJLaserax LXQ-UHP 500W: 500 W, 100 mJLaserax LXQ-UHP 1000W: 1000 W, 100 mJLaserax LXQ-UHP 2000W: 2000 W, 150 mJLaserax LXQ-UHP 3000W: 3000 W, 150 mJFortune Laser FL-C200: 200 W, 2 mJFortune Laser FL-C300: 300 W, 2 mJP-Laser ECO-C 200: 200 W, 1 mJP-Laser ECO-C 500: 500 W, 1.5 mJNetalux Kamino 300: 300 W, 50 mJNarran ROD 300 Air: 300 W, 15 mJNarran ROD 500: 500 W, 50 mJNarran ROD 1000: 1000 W, 50 mJNarran ROD 2000: 2000 W, 100 mJNarran ROD 100 Air: 100 W, 1.54 mJNarran ROD 500 Bright+: 500 W, 100 mJNarran ROD 1000 Bright+: 1000 W, 100 mJNarran ROD 2000 Bright+: 2000 W, 100 mJ
Fleet power vs. pulse energy data
MachineMax Power (W)Pulse Energy (mJ)
Netalux Jango®200100
cleanLASER CL1000iF100010
PULSAR Laser SHARK P CL 100M1001.5
PULSAR Laser SHARK P CL 200M2001.5
PULSAR Laser SHARK P CL 300M3001.5
PULSAR Laser SHARK P CL 500A5001.5
PULSAR Laser SHARK P CL 1000A10001.5
Laserax LXQ-UHP Series (500W–3kW)1750100
4JET JETLASER M20020010
4JET JETLASER M500500100
4JET JETLASER M10001000100
SenFeng SF500HC50050
SenFeng SF1000HC100050
Han's Laser HC-PD1251.5
P-Laser QF-50050050
P-Laser QF-10001000100
P-Laser QF-20002000100
Powerlase Vulcan 500c50040
Powerlase FL-C100C1005
JNCT Laser 100W Air Cooling Laser Cleaning Machine1001
JNCT Laser 200W Air Cooling Laser Cleaning Machine2001
Wuhan Sintec STPL-V-i500C50060
Wuhan Sintec STPL-V-i16001600250
Han's Laser HC-PD 50W501.1
Han's Laser HC-PD 100W1001.5
Han's Laser HC-PD 200W2001.5
Netalux Needle 1001001
Netalux Needle 1501501
Netalux Needle 2002002
Netalux Needle 3003002
cleanLASER CL 50050025
P-Laser QFC-50501
P-Laser QFC-1001001
P-Laser QFC-2002001
P-Laser QFC-3003001
Laserax LXQ-UHP 500W500100
Laserax LXQ-UHP 1000W1000100
Laserax LXQ-UHP 2000W2000150
Laserax LXQ-UHP 3000W3000150
Fortune Laser FL-C2002002
Fortune Laser FL-C3003002
P-Laser ECO-C 2002001
P-Laser ECO-C 5005001.5
Netalux Kamino 30030050
Narran ROD 300 Air30015
Narran ROD 50050050
Narran ROD 1000100050
Narran ROD 20002000100
Narran ROD 100 Air1001.54
Narran ROD 500 Bright+500100
Narran ROD 1000 Bright+1000100
Narran ROD 2000 Bright+2000100
  • MOPA
  • Q-HE
  • Q-std
← Coherent systems

Specifications sourced from manufacturer datasheets. Values are reference data — validate against your machine's actual calibration before production use.

Average power, pulse energy, and cooling

  • What average power does the Coherent PowerLine L 400 deliver?

    The Coherent PowerLine L 400 is a diode-pumped Nd:YAG source with a maximum output power of 325 W (Rofin PowerLine L400 datasheet). The wavelength is 1064 nm. That 325 W figure is the published maximum for this model. The same sheet places the L 400 in thin-film removal on glass, silicon processing, and surface treatment. A setup should start from 325 W at 1064 nm rather than from an air-cooled fiber marker.

  • What pulse energy and pulse width are published, and at what rate?

    At 10 kHz the pulse energy is 30 mJ and the nominal pulse width is 70 ns. Peak power at that same 10 kHz point is greater than 420 kW. Those three figures are stated together at 10 kHz, so they do not promise that 30 mJ and 70 ns hold at every rate from 6 kHz to 50 kHz. Q-switching is how a 325 W[1] average reaches a peak above 420 kW. Use the.

  • What pulse rates can be set?

    The pulse frequency runs from 6 kHz to 50 kHz. That band is the published frequency range for the 1064 nm[1] L 400, so a locked setup stays inside 6 to 50 kHz rather than a rate copied from another cabinet.

  • What cooling and beam does this source use?

    The L 400 requires water cooling. Beam delivery is multimode with a top-hat profile, not a single-mode fiber spot. The laser source weighs 107 kg and the supply unit weighs 150 kg, so this is a fixed cabinet. Power consumption is 4 kW.

Sources(1 reference)
  1. Rofin PowerLine L400 datasheet fabsurplus.com (opens in new tab) — 325 W at 1064 nm, 30 mJ and 70 ns at 10 kHz
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