Power Technology, Inc.: Laser / Photonics Calculations & Conversion Tools

Home > Resource Library > Useful calculations

Useful Calculations

Calculation For Laser Diode Technology

•• Technical support
•• White papers
•• Glossary
•• Useful calculations
•• Applications
•• Email this page to a friend

Calculating Nanometers from wavenumber
To convert from wavenumber (cm^-1) to nanometers, use the following equation:
1/cm^-1 x 10⁷ = nanometers. Or to convert from nanometers to wavenumber, you simply reverse the equation so that wavenumber (cm^-1) = 10⁷ / wavelength in nanometers. Or use the tool below.

Converting angstroms to nanometers
To convert from angstroms to nanometers, use the following equation:
1 angstrom = 0.1 nanometer. Or use the tool below.

Converting Fahrenheit to celsius
To convert from fahrenheit to celsius, use the following equation:
32° Fahrenheit = 0° Celsius. Or use the tool below.

F: C:

Converting Watts to Joules
Power is measured in Watts, named after James Watt (1736-1819). Joules (named after James Prescott Joule, 1818-1889) are units of energy. Use the following equation to convert from Watts to Joules.
1 Watt = 1 Joule per second of power

Calculating Duty Factor
Duty factor (also known as duty cycle) is the ratio of pulse duration to pulse period. Duty factor (Df) is calculated as follows.

Df = pulse duration (sec) / pulse repetition period (sec)

Multiply the result by 100 to get your answer as a percentage.

Please note that as pulse repetition frequency increases, duty factor increases. As pulse repetition period increases, duty factor decreases. As pulse duration increases, duty factor increases.

Converting wavelength to frequency
Use the following equation to convert wavelength to frequency:
v (Hz) = 2.998 x 10¹⁷ / wavelength (nm).

Converting wavenumber to frequency
Use the following equation to convert wavenumber to frequency:
v (Hz) = 2.998 x 10¹⁰ x wavenumber (cm^-1)

tel: 501.407.0712 • fax: 501.407.0036
email: sales@powertechnology.com