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2.05 µm Femtosecond Fiber Laser
Menlo Systems' RED-FIBER is a front-end laser with a 2.05 μm central wavelength and 10 MHz repetition rate. The compact laser is based on Menlo Systems' all-polarization-maintaining, figure 9 mode-locking technology. Intracavity dispersion compensation allows for spectral bandwidths supporting <500 fs pulse durations. An additional preamplifier module can be integrated to boost the output pulse energy to >10 nJ (>100 mW). The RED-FIBER is designed for reliable and long term stable operation in both scientific as well as industrial applications fields. The compact rack mount housing with integrated full remote control over RS232 or USB interface allows for easy integration into subsequent high power laser systems.
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:
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.
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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.
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?
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.