Operational Parameters of the Stanford FEL

                                           Mid-IR                    Far-IR             
                                           (STI)                    (Firefly)       

     
Wavelength                              3 - 15 microns             15 - 65 microns
Micropulse Width                        0.7 - 3 ps                 2 - 10 ps                     
Micropulse Repetition Rate              84.6 ns                    84.6 ns                       
Macropulse Width                        5 ms                       5 ms                          
Macropulse Repetition Rate              20 Hz                      20 Hz                         
Micropulse Energy                       2 microJoule               1 microJoule                          
Average Power                           2 W                        1 W                          
Spectral Bandwidth                      Transform-Limited          Transform-Limited        
                                        Gaussian                   Gaussian            
Spectral Stability                      0.01 % rms                 0.01 % rms                    
Amplitude Stability                     < 2 % rms                  < 2 % rms                     
Annual Operations                       2000 hours                 --------------         

Notes:

1. The laser light comes in a train of short micropulses. This train has a finite length, called the macropulse length. The train then repeats at the macropulse repetition rate. A 1 microjoule pulse every 85 nsec would give a power of 11.8 Watts averaged over microseconds. If this pulse train repeats with a 10% duty factor (5 msec at 20 Hz) the true average power would be 1.18 Watts.
2. These numbers, particularly those for FIREFLY, are guides only. The actual performance is continually being improved.

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