OEM 780 nm and 1560 nm Femtosecond Fiber Lasers
- Menlo Systems' figure 9® Technology
- Highly Stable, Easy to Use, Ideal for OEM Integration
- No Control Unit Required
- 780 nm or 1560 nm Output
Illustration of ELMO-HIGH-POWER Generating THz Pulses with 1560 nm fs Pulses
- Amplifier Seeding
- THz Generation and THz Physics
- Ultrafast Spectroscopy
- Multi-Photon Excitation
- 2-Photon Polymerization and 3D Printing
Detachable SHG Module for Femtosecond Pulses at 780 nm
Achieved with a 3D lithography setup using two photon polymerization and the ELMO-780-HP Femtosecond Laser. Image Courtesy of Nanoscribe GmbH
- High Stability
- Low Amplitude and Phase Noise
- All-PM Fiber Solution
- Single Mode-Lock State
- Menlo Systems' figure 9® Technology
- Laser Output in Less than 60 Seconds
- Repetition Rate: 50 - 100 MHz
- Small Footprint, 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. Both systems are maintenance free and engineered for 24/7 operation.
The ELMO-HIGH-POWER, with its all-fiber design, guarantees excellent stability and low-noise operation. This modular unit can be upgraded to a multicolor and/or multichannel system. The fiber-coupled output includes a PM fiber patch cable up to 30 m long, making the system suitable for THz pulse generation and detection. 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.
The ELMO-780-HIGH-POWER, with its modular concept and its compact frequency doubling module, is optimized for OEM integration and maximum versatility. It includes a second-harmonic generation (SHG) unit, which can be detached and handheld to minimize heat dissipation into the optical setup. Dispersion compensation is available upon request to accommodate microscope objectives and additional optical components.
- VARIO User-Defined Repetition Rate
Factory-Set Value Selectable in the
50 - 100 MHzRange
- MULTIBRANCH Additional Seed Ports
Seeding of Multiple Amplifiers with Optional Subsequent Frequency Conversion to Cover Multiple Wavelengths
|Center Wavelength||780 nm ± 10 nm||1560 nm ± 30 nm|
|Average Output Powera||>140 mW||>180 mW|
|Pulse Widtha||<100 fs||<60 fs (45 fs Typ.)|
|Output Port||Free Space||Fiber-Coupled|
|Polarization||Linear, P-Polarizedb||Linear, PM Fiber|
|Dispersion Managementa||Pigtailed SHG Module with up to 0.5 m Optical Fiber Supply||Dispersion can be factory set to achieve short pulses after 0.5 - 30 m of external fiber|
|Repetition Ratea||100 MHz (50 - 100 MHz with VARIO)|
|2nd Fiber-Coupled Seed Port||Yes|
|2nd High-Power Output Port||Available with MULTIBRANCH|
|Operating Voltage||12 VDC / 2 Ac|
|Power Consumption||20 VA|
|Operating Temperature||15 to 35 °C|
|Warm-Up Time||<60 s|
|Laser Head Dimensions / Weight||195 mm x 95 mm x 75 mm / 2.9 kg
(7.7" x 3.7" x 3.0" / 6.4 lbs)
|195 mm x 95 mm x 75 mm / 2.5 kg
(7.7" x 3.7" x 3.0" / 5.5 lbs)
|SHG Module Dimensions||182 mm x 95 mm x 32 mm / 1.0 kg
(7.2" x 3.7" x 1.3" / 2.2 lbs)
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.
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.|
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.
|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.|
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.