Bibliographic Details
| Title: |
THz generation using a reflective stair-step echelon |
| Authors: |
Ofori-Okai, Benjamin K., Sivarajah, Prasahnt, Huang, W. Ronny, Nelson, Keith A. |
| Publication Year: |
2015 |
| Collection: |
Physics (Other) |
| Subject Terms: |
Physics - Optics |
| More Details: |
We present a novel method for THz generation in lithium niobate using a reflective stair-step echelon structure. The echelon produces a discretely tilted pulse front with less angular dispersion compared to a high groove-density grating. The THz output was characterized using both a 1-lens and 3-lens imaging system to set the tilt angle at room and cryogenic temperatures. Using broadband 800 nm pulses with a pulse energy of 0.95 mJ and a pulse duration of 70 fs (24 nm FWHM bandwidth, 39 fs transform limited width), we produced THz pulses with field strengths as high as 500 kV/cm and pulse energies as high as 3.1 $\mu$J. The highest conversion efficiency we obtained was 0.33%. In addition, we find that the echelon is easily implemented into an experimental setup for quick alignment and optimization.
Comment: 19 pages, 4 figures |
| Document Type: |
Working Paper |
| DOI: |
10.1364/OE.24.005057 |
| Access URL: |
http://arxiv.org/abs/1512.03941 |
| Accession Number: |
edsarx.1512.03941 |
| Database: |
arXiv |
