CW Laser Power Calculator

Calculate threshold pump power, output power, slope efficiency, and peak irradiance for CW lasers.

Input

Gain Medium Preset?

Pump Wavelength (λ_p)

Laser Wavelength (λ_l)

Emission Cross-Section (σ)?

Fluorescence Lifetime (τ_f)

Mode Radius (w)?

Output Coupler Transmission (T)

Internal Loss (δ)

Pump Power (P_pump)

Output Beam Waist (w_beam)?

Threshold & Efficiency

Threshold pump power

P_th

2.496W

Quantum efficiency

\u03b7_q = \u03bb_p / \u03bb_l

75.94%

Slope efficiency

\u03b7_s = \u03b7_q \u00d7 \u03b7_a \u00d7 \u03b7_c \u00d7 T/(T+\u03b4)

44.69%

Output

Output power

P_out = \u03b7_s \u00d7 (P_pump \u2212 P_th)

3.353W

Peak irradiance

I\u2080 = 2P / (\u03c0w\u00b2)

853.9W/cm\u00b2

Abridged Optics — CW Laser Power Calculator v1.0\u03b7_a = 0.90, \u03b7_c = 0.85 \u00b7 h = 6.626\u00d710\u207b\u00b3\u2074 J\u00b7s \u00b7 c = 3\u00d710\u2078 m/s