Utilize our free online Laser Linewidth and Bandwidth Calculator to quickly determine crucial laser parameters. Convert between frequency linewidth (Δν), wavelength bandwidth (Δλ), and coherence length (Lc) for various laser applications, ensuring precision in optical system design and analysis.
Formula:
This calculator interconverts between laser frequency linewidth (Δν), wavelength bandwidth (Δλ), and coherence length (Lc) based on the center wavelength (λ).
- Frequency Linewidth (Δν): The spectral width of a laser's output in terms of frequency (Hz).
- Wavelength Bandwidth (Δλ): The spectral width of a laser's output in terms of wavelength (nm).
- Coherence Length (Lc): The propagation distance over which a laser beam maintains a specified degree of coherence (m).
- Center Wavelength (λ): The primary wavelength of the laser (nm).
- Speed of Light (c): Approximately 299,792,458 m/s.
Formulas Used:
1. Wavelength Bandwidth from Frequency Linewidth:
Δλ = (Δν × λ²) / c
2. Frequency Linewidth from Wavelength Bandwidth:
Δν = (c × Δλ) / λ²
3. Coherence Length from Frequency Linewidth:
Lc = c / Δν
4. Frequency Linewidth from Coherence Length:
Δν = c / Lc