Measurement of signal-to-noise ratio for mixture of coherent and incoherent sources using digital sampling oscilloscope

Gyeon-il Kweon; Jung-ho Choi; Ji-heon Jeong

doi:10.1117/12.517935

6 October 2003 Measurement of signal-to-noise ratio for mixture of coherent and incoherent sources using digital sampling oscilloscope

Gyeon-il Kweon, Jung-ho Choi, Ji-heon Jeong

Author Affiliations +

Proceedings Volume 5137, International Conference on Lasers, Applications, and Technologies 2002: Advanced Lasers and Systems; (2003) https://doi.org/10.1117/12.517935
Event: International Conference on Lasers, Applications, and Technologies 2002, 2002, Moscow, Russian Federation

Abstract

Signal-to-noise for a coherent laser source and a mixture of a laser source with a narrow band amplified spontaneous emission source are directly measured using a digital sampling oscilloscope. The measurement for a coherent source is found unreliable due to the low level of shot-noise compared to the thermal noise. On the other hand, the measurement for a mixed source is found in good agreement with theoretical predictions within 1dB error.

Citation Download Citation

Gyeon-il Kweon, Jung-ho Choi, and Ji-heon Jeong "Measurement of signal-to-noise ratio for mixture of coherent and incoherent sources using digital sampling oscilloscope", Proc. SPIE 5137, International Conference on Lasers, Applications, and Technologies 2002: Advanced Lasers and Systems, (6 October 2003); https://doi.org/10.1117/12.517935

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