OEM 1045 nm Femtosecond Laser

  • Menlo Systems' figure 9® Technology
  • Highly Stable and Easy to Use
  • Ideal for OEM Integration
  • >4 W Output Power
  • 40 nJ Pulse Energy


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Optional Packages

  • Pulse Picking (50 MHz or Lower)
    • Divides Repetition Rate by a Factor of 3 or More, Pulse Energy Stays Constant
    • Can be Used as Fast Amplitude Modulator 
  • Fast Amplitude Modulation


  • Multi-Photon Excitation
  • Laser Machining
  • Ultrafast Spectroscopy
  • Optegenetic Photoactivation
  • Two-Photon Polymerization
  • Single Cell Engineering
Jason Reeves
Jason Reeves
Menlo Systems
Feedback? Questions? Need a Quote?

Please note that these femtosecond fiber lasers are available directly from Menlo Systems.
United States
Phone: +1-973-300-4490
Email: ussales@menlosystems.com
Outside United States
Phone: +49-89-189166-0
Email: sales@menlosystems.com


  • 1045 nm Center Wavelength
  • Output Power >4 W (@ 100 MHz)
  • Repetition Rate 30 - 100 MHz
  • 40 nJ Pulse Energy
  • High Stability
  • Low Amplitude and Phase Noise
  • Single Mode-Lock State
  • figure 9® Technology
  • Laser Output in Less Than 60 Seconds
  • Compact Laser Head Footprint
  • Silent Operation, No Water Cooling

Menlo Systems' YLMO femtosecond fiber laser integrates the latest developments in fiber technology into an easy-to-use product. Their patented figure 9® technology delivers reliable and consistent mode-locking, which is ideally suited to ensure long-term stable operation in demanding environments. The YLMO laser, with its PM-fiber design, guarantees excellent stability and consistent long-term performance.

The YLMO fiber laser is engineered with life science and multi-photon applications in mind. The pulses can be pre-chirped to attain their shortest width within their intended target sample.

The installation of the laser system is easy and takes only a few minutes. For ease of operation, the laser is switched on by the push of a single button. The maintenance-free operation guarantees a worry-free device that enables our customers to focus their time and resources on their actual application.

YLMO for Microscopy

2-Photon Excitation of a Mouse Brain: Imaging of YFP-Labeled Mouse Brain using Thorlabs Cerna® Microscope Equipped with YLMO


3D Surface Measurement of tdTomato-Labeled Eye of a Fruit Fly using Thorlabs Cerna® Microscope Equipped with YLMO

Item # YLMO
Central Wavelength 1045 ± 5 nm
Average Powera >4 W (@ 100 MHz)
Pulse Energy >40 nJ
Pulse Widtha <80 fs
Repetition Ratea
Factory Set between 30 MHz and 100 MHz
Output Port Free Space
Polarization P-Pol. in Free Space (PER: 23 dB Typ.)
Pulse Picking Option Available for Repetition Rates ≤50 MHz
  • Please inquire for your specific combinations of average power, pulse width, and repetition rate.

Pulsed Laser Emission: Power and Energy Calculations

Determining whether emission from a pulsed laser is compatible with a device or application can require referencing parameters that are not supplied by the laser's manufacturer. When this is the case, the necessary parameters can typically be calculated from the available information. Calculating peak pulse power, average power, pulse energy, and related parameters can be necessary to achieve desired outcomes including:

  • Protecting biological samples from harm.
  • Measuring the pulsed laser emission without damaging photodetectors and other sensors.
  • Exciting fluorescence and non-linear effects in materials.

Pulsed laser radiation parameters are illustrated in Figure 1 and described in the table. For quick reference, a list of equations are provided below. The document available for download provides this information, as well as an introduction to pulsed laser emission, an overview of relationships among the different parameters, and guidance for applying the calculations. 



Period and repetition rate are reciprocal:    and 
Pulse energy calculated from average power:       
Average power calculated from pulse energy:        
Peak pulse power estimated from pulse energy:            

Peak power and average power calculated from each other:
Peak power calculated from average power and duty cycle*:
*Duty cycle () is the fraction of time during which there is laser pulse emission.
Pulsed Laser Emission Parameters
Click to Enlarge

Figure 1: Parameters used to describe pulsed laser emission are indicated in the plot (above) and described in the table (below). Pulse energy (E) is the shaded area under the pulse curve. Pulse energy is, equivalently, the area of the diagonally hashed region. 

Parameter Symbol Units Description
Pulse Energy E Joules [J] A measure of one pulse's total emission, which is the only light emitted by the laser over the entire period. The pulse energy equals the shaded area, which is equivalent to the area covered by diagonal hash marks.
Period Δt  Seconds [s]  The amount of time between the start of one pulse and the start of the next.
Average Power Pavg Watts [W] The height on the optical power axis, if the energy emitted by the pulse were uniformly spread over the entire period.
Instantaneous Power P Watts [W] The optical power at a single, specific point in time.
Peak Power Ppeak Watts [W] The maximum instantaneous optical power output by the laser.
Pulse Width Seconds [s] A measure of the time between the beginning and end of the pulse, typically based on the full width half maximum (FWHM) of the pulse shape. Also called pulse duration.
Repetition Rate frep Hertz [Hz] The frequency with which pulses are emitted. Equal to the reciprocal of the period.

Example Calculation:

Is it safe to use a detector with a specified maximum peak optical input power of 75 mW to measure the following pulsed laser emission?

  • Average Power: 1 mW
  • Repetition Rate: 85 MHz
  • Pulse Width: 10 fs

The energy per pulse:

seems low, but the peak pulse power is:

It is not safe to use the detector to measure this pulsed laser emission, since the peak power of the pulses is >5 orders of magnitude higher than the detector's maximum peak optical input power.

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1045 nm OEM Femtosecond Fiber Laser

Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Universal Price Available
YLMO Support Documentation
YLMOOEM Femtosecond Fiber Laser, 1045 nm, >4 W, 100 MHz
Menlo Lead Time