Broadband THz emission of long pulses from photomixing process with optical chirped pulses
Fuente:
arXiv
Guardado en:
| Autores principales: | , , , , , , |
|---|---|
| Formato: | Preprint |
| Publicado: |
2024
|
| Materias: | |
| Acceso en línea: | |
| Etiquetas: |
Agregar Etiqueta
Sin Etiquetas, Sea el primero en etiquetar este registro!
|
| _version_ | 1866909412869799936 |
|---|---|
| author | Taton, Gabriel Fauquet, Frederic Betka, Ilyes Guillet, Jean-Paul Darrack, Frederic Mounaix, Patrick Bigourd, Damien |
| author_facet | Taton, Gabriel Fauquet, Frederic Betka, Ilyes Guillet, Jean-Paul Darrack, Frederic Mounaix, Patrick Bigourd, Damien |
| contents | Terahertz (THz) generation via photomixing on photoconductive antenna using twin delayed chirped pulses provides a long THz pulse with a narrow bandwidth. To generate a long pulse with broad bandwidth, we propose a new method that combines two long optical pulses with opposite chirps. The pulses exhibit temporal distributions of their instantaneous frequencies with opposite slopes. As a result, interaction between the beat frequency evolving over time and a photoconductor produces a broad THz spectrum with temporal variations. In our experimental setup, we generate a 12 ps-long pulse with a 1 THz bandwidth spectrum, featuring a frequency ramp of 90 GHz/ps, resembling a chirped THz pulse. This approach signifies a major advancement toward integrating photomixer technology, particularly in THz ranging applications. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2412_01970 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Broadband THz emission of long pulses from photomixing process with optical chirped pulses Taton, Gabriel Fauquet, Frederic Betka, Ilyes Guillet, Jean-Paul Darrack, Frederic Mounaix, Patrick Bigourd, Damien Optics Terahertz (THz) generation via photomixing on photoconductive antenna using twin delayed chirped pulses provides a long THz pulse with a narrow bandwidth. To generate a long pulse with broad bandwidth, we propose a new method that combines two long optical pulses with opposite chirps. The pulses exhibit temporal distributions of their instantaneous frequencies with opposite slopes. As a result, interaction between the beat frequency evolving over time and a photoconductor produces a broad THz spectrum with temporal variations. In our experimental setup, we generate a 12 ps-long pulse with a 1 THz bandwidth spectrum, featuring a frequency ramp of 90 GHz/ps, resembling a chirped THz pulse. This approach signifies a major advancement toward integrating photomixer technology, particularly in THz ranging applications. |
| title | Broadband THz emission of long pulses from photomixing process with optical chirped pulses |
| topic | Optics |
| url | https://arxiv.org/abs/2412.01970 |