Table. 1 Calculated R-branch absorption lines and corresponding lasing lines of H79Br.

From: Towards high-power mid-IR light source tunable from 3.8 to 4.5 µm by HBr-filled hollow-core silica fibres

Pump lines

Pump λ (nm)

R-branch laser lines

Laser λ (nm)

P-branch laser lines

Laser λ (nm)

R(12)

1939.00

R(12)

3759.78

P(14)

4539.72

R(11)

1940.53

R(11)

3809.67

P(13)

4495.85

R(10)

1942.44

R(10)

3824.48

P(12)

4453.52

R(9)

1944.74

R(9)

3840.21

P(11)

4412.69

R(8)

1947.42

R(8)

3856.88

P(10)

4373.31

R(7)

1950.49

R(7)

3874.49

P(9)

4335.34

R(6)

1953.95

R(6)

3893.06

P(8)

4298.73

R(5)

1957.79

R(5)

3912.60

P(7)

4263.46

R(4)

1962.02

R(4)

3933.13

P(6)

4229.49

R(3)

1966.65

R(3)

3954.66

P(5)

4196.78

R(2)

1971.67

R(2)

3977.21

P(4)

4165.31

R(1)

1977.09

R(1)

4000.80

P(3)

4135.04

R(0)

1982.90

R(0)

4025.44

P(2)

4105.94

  1. This shows the potential ultrabroad mid-IR wavelength range (>750 nm) of the HBr laser achieved by using a small range (~40 nm) tunable 2 μm pump source.