Mode-locked semiconductor laser for long and absolute distance measurement based on laser pulse repetition frequency sweeping: a comparative study between three types of lasers

D. Castro Alves; Manuel Abreu; Alexandre Cabral; J. M. Rebordão

doi:10.1117/12.2271553

22 August 2017 Mode-locked semiconductor laser for long and absolute distance measurement based on laser pulse repetition frequency sweeping: a comparative study between three types of lasers

D. Castro Alves, Manuel Abreu, Alexandre Cabral, J. M. Rebordão

Author Affiliations +

Proceedings Volume 10453, Third International Conference on Applications of Optics and Photonics; 104530E (2017) https://doi.org/10.1117/12.2271553
Event: Third International Conference on Applications of Optics and Photonics, 2017, Faro, Portugal

Abstract

In this work we present a study on three types of semiconductor mode-locked lasers as possible sources for a high precision absolute distance metrology measurement concept based on pulse repetition frequency (PRF) sweep. In this work, we evaluated one vertical emission laser and two transversal emission sources. The topology of the gain element is quantum-well, quantum-dot and quantum-dash, respectively. Only the vertical emission laser has optical pump, whilst the others operate with electric pumping. The quantum-dash laser does not have a saturable absorber in its configuration but relies on a dispersion compensating fiber for generating pulses. The bottleneck of vertical emission laser is his high power density pump (4.5W/165μm), increasing the vulnerability of damaging the gain element. The other lasers, i.e., the single (quantum-dash) and double section (quantum-dot) lasers present good results either in terms of applicability to the metrology system or in terms of robustness. Using RF injection on the gain element, both lasers show good PRF stabilization results (better than σ_y(10ms) = 10⁻⁹ ) which is a requirement for the mentioned metrology technique.

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D. Castro Alves, Manuel Abreu, Alexandre Cabral, and J. M. Rebordão "Mode-locked semiconductor laser for long and absolute distance measurement based on laser pulse repetition frequency sweeping: a comparative study between three types of lasers", Proc. SPIE 10453, Third International Conference on Applications of Optics and Photonics, 104530E (22 August 2017); https://doi.org/10.1117/12.2271553

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KEYWORDS

Semiconductor lasers

Metrology

Mode locking

Pulsed laser operation

Laser metrology

Laser stabilization

Distance measurement

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