Table 1 Filaments in air observed in literature.

From: Filamentation in Atmospheric Air with Tunable 1100–2400 nm Near-Infrared Femtosecond Laser Source

Wavelength (nm)

FWHM Time Duration (fs)

Pulse Energies (mJ)

Critical Power

(C = 3.77)

(GW)

Critical Power

(C = 6.4)

(GW)

Experimental Pulse Powers (GW)

Reference

248

450

2–5

0.2

0.3

4–10

31

248

5000

7.5

0.2

0.3

1.4

31

400

~60

2.3

0.5

0.8

36

7

406

40

1

0.5

0.8

7

32

527

900

1.6–4

0.8

1.4

2–4

33

775

200

2–50

1.8

3.1

9–235

18

800

42

2.3

1.9

3.3

51

7

1030

200

1.5–10

3.2

5.4

7–47

34

3900

~80–200

20–30

46

77

200–350

8

10200

3500

5200

310

530

1400

35

  1. Critical powers are estimated with Eq. (2) using n2 ~ 5 × 10−19 cm2/W as an estimate from literature7, and experimental pulse powers are computed with Eq. (1) assuming a Gaussian pulse.
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