Details

Autor(en) / Beteiligte

• Yang, Fei
• Zhao, Jiejun
• Xi, Zhang
• Feng, Zitong
• Wu, Rui
• Cai, Haiwen
• Wei, Rong
• Wang, Dongjin

Titel

Phase Noise Directely Measurement of Optical Second Harmonic Generation in MgO:PPLN Waveguide based on the 120-degree Phase Difference Interferometer

Ist Teil von

• 2019 Joint Conference of the IEEE International Frequency Control Symposium and European Frequency and Time Forum (EFTF/IFC), 2019, p.1-2

Ort / Verlag

IEEE

Erscheinungsjahr

2019

Quelle

IEEE Xplore

Beschreibungen/Notizen

• A method based on the 120-degree phase difference interferometer for directly measuring the phase noise of 780 nm and 1560 nm laser is proposed. It can measure the phase noise as low as -150 dBc/Hz. The fundamental and double frequency laser with 1560 nm and 780 nm in MgO:PPLN waveguide are measured simultaneously. The results show that measured phase noise relationship between the 1560 nm and 780 nm laser without modulation is consistent with the SHG theoretical model. But if phase modulation exists in the laser, there would be additional noise in the SHG process. Especially when the phase modulation is strong, the modulation sidebands would generate the second, third even higher harmonic noise in the SHG process. These additional uncertain noise may affect the locking performance of Rb fountain atomic clock used the SHG laser source.