OEM 780 nm and 1560 nm Femtosecond Fiber Lasers

  • Menlo Systems' figure 9® Technology
  • Highly Stable, Easy to Use, Ideal for OEM Integration
  • One-Box Solution, No Control Unit Required
  • 780 nm or 1560 nm Output


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Simon Kocur
Simon Kocur
Menlo Systems
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Please note that these femtosecond fiber lasers are available directly from Menlo Systems, Inc. within the United States and from Menlo Systems GmbH outside the United States.
United States
Phone: +1-973-300-4490
Email: ussales@menlosystems.com
Outside United States
Phone: +49-89-189166-0
Email: sales@menlosystems.com


  • Amplifier Seeding
  • THz Generation and THz Physics
  • Ultrafast Spectroscopy

Optional Packages

  • VARIO User-Defined Repetition Rate
    Factory-Set Value Selectable in the 50 - 100 MHz Range
  • MULTIBRANCH Additional Seed Ports
    Seeding of Multiple Amplifiers with Optional Subsequent Frequency Conversion to Cover Multiple Wavelengths


  • High Stability
  • Low Amplitude and Phase Noise
  • All-PM Fiber Solution
  • Single Mode-Lock State
  • figure 9® Technology
  • Laser Output in Less than 60 Seconds
  • Repetition Rate: 50 - 100 MHz
  • Small Footprint with No External Control Unit Required

Menlo Systems' fiber-based femtosecond laser sources integrate the latest achievements in fiber technology into easy-to-use products. Menlo Systems' unique figure 9 mode-locking technology results in reproducible and long-term stable operation. The ELMO, with its all-fiber design, guarantees excellent stability and low-noise operation. As a seed source for fiber amplifiers, the oscillator is maintenance free, user installed, and ready to use at the press of a single button. In short, this is an OEM laser engineered for 24/7 operation. See the Specs Tab for more information.

Center Wavelength 780 nm ± 10 nm 1560 nm ± 30 nm
Average Output Power >75 mW > 1 mW >100 mW
Pulse Energy >0.75 nJ >10 pJ >1.0 nJ
Pulse Width <100 fs Chirped <90 fs
Repetition Rate 100 MHz (50 - 100 MHz with VARIO)a
Output Port Free Space Fiber-Coupled (SC/APC)
Dispersion Management - Dispersion can be factory set to achieve short pulses after 1 - 10 m of additional fiber
2nd Fiber-Coupled Seed Port Yes
2nd High-Power Output Port - - Available with MULTIBRANCH
Polarization Linear, P-Polarizedb Linear, PM Fiber
  • Please inquire with Menlo Systems for your specific combinations of average power, pulse duration, and repetition rate.
  • The handheld SHG module can also be mounted for S polarization.

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.

Posted Comments:
Hidetoshi Nakanishi  (posted 2019-06-19 15:07:57.51)
(株)SCREENホールディングスの中西英俊です。 価格などの情報も提供いただけると助かります。800nm程度の安価で高出力なfsレーザーを探しています。
YLohia  (posted 2019-06-19 08:33:09.0)
Hello, thank you for contacting Thorlabs. Our Technical Support team from Japan will reach out to you directly.

Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Universal Price Available
ELMO Support Documentation
ELMOOEM Femtosecond Fiber Seed Laser, 1560 nm, >1 mW, 100 MHz
Menlo Lead Time
ELMO-780 Support Documentation
ELMO-780OEM Femtosecond Fiber Laser, 780 nm, >75 mW, 100 MHz
Menlo Lead Time
ELMO-HIGH-POWER Support Documentation
ELMO-HIGH-POWEROEM Femtosecond Fiber Laser, 1560 nm, >100 mW, 100 MHz
Menlo Lead Time