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MOPA fiber lasers: the pulse width is the whole difference

MOPA stands for Master Oscillator Power Amplifier. A low-power seed laser makes the pulse and a separate amplifier stage boosts it, so the pulse duration can be set independently of the power. The two makers here that publish a range both state 2 to 500 ns. A standard Q-switched fiber marker holds its pulse fixed, and no amount of wattage substitutes for it.

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A MOPA source is defined by an adjustable pulse width, and 2 of the 4 MOPA machines here publish one. Wattage does not substitute for it at any price.

2 of 4 publish a pulse width; xTool publishes noneWhat each maker states about the specification that defines a MOPA source

Laser Oracle holds sourced specifications for 4 of the machines listed on this page, across 3 brands. The makers that state a pulse width publish 2–500 ns (adjustable) and 2 to 500 ns (60W), and that adjustable range is the whole of what MOPA means. A Q-switched fiber source holds its pulse fixed instead: Monport states 80 to 120 ns for its GM30 Pro on the same specification table where it states 2 to 500 ns for the GM60 Mopa Pro, and it publishes colour engraving support for the second machine and not the first. 2 of 4 state one; the rest publish none, so the specification that defines a MOPA source is not stated by the maker selling the machine. This page reports that rather than estimating it. Every figure is read from the manufacturer's own product page or specification table, most recently retrieved 2026-08-15.

4 machines are in stock on Amazon today, from $3,699.99. Prices refresh every three hours.

Every figure behind this guide, sourced and datedThe full finding: counts, ordering, and the spec nobody prints

Laser Oracle tracks 4 laser machines in stock on Amazon today, with prices from the Amazon Product Advertising API refreshed every three hours, starting at $3,699.99. The list is ordered by Amazon's own category placement rather than by our preference; the best-placed machine currently sits at #60 in Engraving Machines & Tools. 4 of them carry a full sourced review here, with the workspace requirement, license cost and software compatibility read from each manufacturer's own pages. The gap a buyer should know about: of the reviewed machines in this bracket, none publishes an optical output figure, as distinct from the wattage on the box. Laser Oracle does not test machines: every figure on this page is a live listing value or a quotation from a manufacturer document, dated when it was read.

What each maker publishes about pulse width

Pulse width is the specification that defines a MOPA source, and 2 of the 4 machines on this page with sourced specifications state one. This is what each maker publishes, quoted, with the date it was read.

Published pulse width, by machine
MachinePulse width, as publishedSource
Monport GM60 Mopa Pro2–500 ns (adjustable)Monport: Monport GM Series Full Specifications (GM30 Pro, GM50 Pro, GM30 Mopa Pro, GM60 Mopa Pro)Read 2026-08-15
ComMarker B6 60W2 to 500 ns (60W)ComMarker: ComMarker B6 JPT MOPA Fiber Laser EngraverRead 2026-08-14
xTool F2 Ultra DualNot publishedxTool: xTool F2 Ultra 60W MOPA & 40W Diode Dual Laser EngraverRead 2026-08-14
xTool F2 Ultra SingleNot publishedxTool: xTool F2 Ultra 60W MOPA & 40W Diode Dual Laser EngraverRead 2026-08-14

We may earn a commission from links on this page, at no extra cost to you. It does not change which products appear or in what order.

xTool F2 Ultra Single 60W MOPA Fiber Laser Engraver8.4

Amazon's best-placed

xTool F2 Ultra Single 60W MOPA Fiber Laser Engraver

Amazon: #60 in Engraving Machines & Tools

$3,999$4,999Save $1,000

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Image: Amazon

Monport 60W JPT & MOPA Fiber Laser Engraver with 3D & Deep Engraving10.0

The lowest price today

Monport 60W JPT & MOPA Fiber Laser Engraver with 3D & Deep Engraving

Amazon: #807 in Engraving Machines & Tools

$3,700

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Image: Amazon

xTool F2 Ultra 60W MOPA & 40W Diode Dual Laser Engraver9.4

Fully reviewed here

xTool F2 Ultra 60W MOPA & 40W Diode Dual Laser Engraver

Space, subscriptions and compatibility, sourced and dated

$4,999$6,499Save $1,500

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Image: Amazon

4 of these carry sourced specificationsEvery figure on those pages is quoted from the maker's own documentation, with the date it was read.

Every machine, compared

Ordered by Amazon’s category placement, refreshed every three hours.

See the full spec comparison
Machines in stock on Amazon, with live price and category placement
ModelPrice todayAmazon placementSpec score
xTool F2 Ultra Single 60W MOPA Fiber Laser EngraverxTool$3,998.99#60 in Engraving Machines & Tools8.4
xTool F2 Ultra 60W MOPA & 40W Diode Dual Laser EngraverxTool$4,998.98#60 in Engraving Machines & Tools9.4
Monport 60W JPT & MOPA Fiber Laser Engraver with 3D & Deep EngravingMonport$3,699.99#807 in Engraving Machines & Tools10.0
ComMarker B6 60W JPT Mopa Fiber Laser EngraverComMarker$3,999#1122 in Engraving Machines & Tools7.6

“Price-tracked only” means we hold the live listing but have not yet sourced the manufacturer’s specification sheet for it.

The best-placed listings, live

The 3 Amazon places highest of the 4 in the table above. We may earn a commission from these links, at no extra cost to you. It does not change which products appear or in what order.

xTool F2 Ultra Single 60W MOPA Fiber Laser Engraver8.4

xTool

xTool F2 Ultra Single 60W MOPA Fiber Laser Engraver

Amazon: #60 in Engraving Machines & Tools

$3,999$4,999Save $1,000

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Image: Amazon

Monport 60W JPT & MOPA Fiber Laser Engraver with 3D & Deep Engraving10.0

Monport

Monport 60W JPT & MOPA Fiber Laser Engraver with 3D & Deep Engraving

Amazon: #807 in Engraving Machines & Tools

$3,700

Check price at Amazon

Image: Amazon

ComMarker B6 60W JPT Mopa Fiber Laser Engraver7.6

ComMarker

ComMarker B6 60W JPT Mopa Fiber Laser Engraver

Amazon: #1122 in Engraving Machines & Tools

$3,999

Check price at Amazon

Image: Amazon

How this list was builtThe screen, the ordering, and what we do not do

The screen is mechanical: every machine we track on Amazon that is in stock, carries a live price, and is not a duplicate listing. The order is Amazon’s own category placement, read from the Product Advertising API and refreshed every three hours. Laser Oracle does not test machines and has no preference to encode; where a unit has a full review here, the review quotes the manufacturer’s own documents with the date each was read. Guide copy last reviewed 2026-08-23.

What is a MOPA laser?
MOPA stands for Master Oscillator Power Amplifier, and the name describes how the laser is built. A low-power seed laser, the master oscillator, generates the pulse; a separate fiber amplifier stage then boosts it. Because generating the pulse and amplifying it happen in two stages rather than one, the pulse duration and the repetition rate can be set independently. A Q-switched fiber laser generates and amplifies in a single cavity, so its pulse duration is a property of that cavity and is effectively fixed. In published specifications the difference shows up as a range instead of a value: ComMarker states 2 to 500 ns for the B6 60W and Monport states 2 to 500 ns for the GM60 Mopa Pro, while Monport states a fixed 80 to 120 ns for its Q-switched GM30 Pro.
MOPA vs fiber laser: what is the actual difference?
A MOPA is a fiber laser, so the comparison people mean is MOPA against Q-switched, which is the other way a fiber source is built. The difference is one specification: whether you can set the pulse duration. Everything else follows from it. Colour marking on stainless, annealing without cutting into the surface, and marking thin anodised aluminium all depend on controlling how much heat lands and for how long. A Q-switched machine at twice the wattage still cannot do them.
Can a Q-switched fiber laser do colour marking?
Not according to the manufacturers. Monport publishes colour engraving support and lists stainless steel including colour marking for the GM60 Mopa Pro, which it specifies with an adjustable 2 to 500 ns pulse width and a 1 to 4000 kHz frequency range. For its Q-switched GM30 Pro, on the same specification table, Monport states a fixed 80 to 120 ns pulse and makes no colour claim at all. That is one manufacturer drawing the line between its own two machines, which is stronger evidence than any third party explaining the physics. Laser Oracle does not test machines and does not assert a mechanism it has not read.
Which MOPA machines publish their pulse width?
Half of them. Of the MOPA machines in this catalogue with sourced specifications, ComMarker and Monport both publish an adjustable 2 to 500 nanosecond range, and xTool publishes no pulse width for either version of the F2 Ultra. That is the specification defining the source type, sold on a machine whose maker does not state it. Where a manufacturer publishes nothing, this site says so rather than estimating.
What is the best MOPA fiber laser?
It depends on whether you need the second source. The xTool F2 Ultra Dual carries a 60W MOPA fiber and a 40W diode in one enclosure, which is the only machine here that marks metal and cuts wood without a second purchase. The ComMarker B6 60W and the Monport GM60 Mopa Pro are MOPA-only markers that publish the pulse width xTool does not. Laser Oracle does not test machines, so the table below is ordered by Amazon’s own category placement and every specification is quoted from the maker with the date it was read.

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