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| eV | nm | cm-1 | fs | ||||||||
| meV | μm | THz | ps |
Relevant formulas: `E=hc/λ` `ν=c/λ` `κ=1/λ` `T=1/ν`
Definitions:
E = energy(eV) λ = wavelength(m) κ = wavenumber(m-1) T = period(s)
ν = frequency(s-1 or Hz) c = speed of light = 299792458 m/s
h = Planck's constant = 4.135667516 •
10-15 eV*s
| λ | nm | d | mm | f | mm | ||||
| dof | um | S | um |
Relevant formulas: `S=(4*M^2*λ*f)/(d*π)` `dof=2*z_r` `z_r=(π/(M^2*λ))*(S^2/4)`
Definitions:
M2 is the beam quality factor.
λ is the wavelength of the light in the beam.
f is the focal length of the lens.
d is the diameter of the beam at the lens.
zr is the Rayleigh range.
dof is the depth of focus.
| Quantity type: | Decibel unit: | Reference level: | |||||
| Level: | Decibels: |
Relevant formulas: `G_{dB}=10log_10(P_2/ P_1 )` `G_{dB}=20log_10(V_{out}/ V_{\text{in}} )`
Definitions:
P2 is the power level.
P1 is the referenced power level.
GdB is the power ratio or gain in dB.
| `\omega_p` | rad/s | `\omega_0` | rad/s | `\lambda_{min}` | nm | `\lambda_{max}` | nm | ||||
| `\lambda_{step}` | nm | `\tau_1` | s | `\tau_2` | s | `f_i` |
Relevant formulas: `\varepsilon=\varepsilon_\infty-\omega_p^2/(\omega^2+j*\omega/\tau_1)+(f_i*\omega_p^2)/(\omega_0^2-\omega^2-j*\omega/\tau_2)`
Definitions:
wp is plasma frequency.
w0 is resonant frequency.
t1 is Drude decay lifetime.
t2 is resonant oscillation decay lifetime.
| `\Delta\tau` | fs | `\lambda` | nm | TBWP | `\Delta\lambda` | nm |
Minimum TBWP for pulses with Gauss-shape: 0.44 Sech^2-shape: 0.315
Relevant formulas: `TBWP=\Delta\tau*\Delta\lambda*c/\lambda^2`
Definitions:
`\Delta\tau` is pulse duration.
`\Delta\lambda` is bandwidth.
`\lambda` is wavelength.
TBWP is time bandwidth product.
| thickness | nm | polarization | `\theta` | deg | |||
| `\lambda_{min}` | nm | `\lambda_{max}` | nm | `\lambda_{step}` | nm |
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