Abstract

We present a novel measurement scheme and instrumentation for quantifying laser power by means of photon momentum. The optical design is optimized such that the incoming laser beam is minimally perturbed and is available for other purposes along the incoming beam axis. Additionally, the geometry of the instrument gives access to the small but measurable transmittance between two passive mirrors that face the force sensor. The force sensor is based on a commercially available weighing instrument (“scale”) that has a temporal response of approximately 5 s and a readability of approximately 1 μg (2  W). Our measurement results demonstrate beam profile and power for 500 W, but the mirror and mass (or force) calibration are suitable for very high power up to 50 kW and beyond. The optics are based on commercially available, off-the-shelf mirrors optimized for the angle of incidence and maximum reflectance at the wavelength of 1070 nm. The size of the complete instrument has an input aperture of Ø75  mm, but this constraint is only a matter of optimizing the beam path and box geometry.

Full Article  |  PDF Article
OSA Recommended Articles
Portable, high-accuracy, non-absorbing laser power measurement at kilowatt levels by means of radiation pressure

Paul Williams, Joshua Hadler, Frank Maring, Robert Lee, Kyle Rogers, Brian Simonds, Matthew Spidell, Michelle Stephens, Ari Feldman, and John Lehman
Opt. Express 25(4) 4382-4392 (2017)

Use of radiation pressure for measurement of high-power laser emission

Paul A. Williams, Joshua A. Hadler, Robert Lee, Frank C. Maring, and John H. Lehman
Opt. Lett. 38(20) 4248-4251 (2013)

Direct measurement of radiation pressure and circulating power inside a passive optical cavity

Ryan Wagner, Felipe Guzman, Akobuije Chijioke, Gurpreet Kaur Gulati, Matthias Keller, and Gordon Shaw
Opt. Express 26(18) 23492-23506 (2018)

References

You do not have subscription access to this journal. Citation lists with outbound citation links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Cited By

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Figures (3)

You do not have subscription access to this journal. Figure files are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Tables (1)

You do not have subscription access to this journal. Article tables are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Equations (1)

You do not have subscription access to this journal. Equations are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription