Heterodyne detection of optical terahertz beat-tones based on semiconductor optical amplifier
| Autor: | Severine Philippe, Ramón Maldonado-Basilio, Pascal Landais, Sylwester Latkowski |
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| Jazyk: | angličtina |
| Rok vydání: | 2011 |
| Předmět: |
Physics
Optical amplifier Spectrum analyzer Terahertz radiation business.industry Local oscillator Lasers Far-infrared laser Physics::Optics terahertz multimode semiconductor laser four wave mixing semiconductor optical amplifier heterodyning detection Photomixing Optics Photonics Intermediate frequency Semiconductors Optoelectronics Optical communication Heterodyne detection business |
| Zdroj: | Philippe, Severine, Maldonado-Basilio, Ramón, Latkowski, Sylwester ORCID: 0000-0003-4464-4097 |
| Popis: | In this paper, a detection scheme based on four wave mixing in a semiconductor optical amplifier (SOA) is used to measure the frequency and bandwidth of the optical terahertz beat-tone signal generated by a passively mode locked semiconductor laser. Two signals from external cavity lasers are injected into an SOA, which acts as a local oscillator at their detuning frequency. The device under test is a passively mode locked laser with a beat-tone frequency in the terahertz spectrum. Its optical signal is injected in the SOA, which also acts as a frequency mixer. The frequency and linewidth of the terahertz signal are then measured by retrieving the intermediate frequency detected by a low bandwidth photodiode and an electrical spectrum analyser. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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