Speckle reduction characterization of high power broad-area edge-emitting diodes lasers

Kim Trinh Tran Thi; Zhaomin Tong; Muhammad Nadeem Akram

doi:10.1117/12.978228

11 September 2012 Speckle reduction characterization of high power broad-area edge-emitting diodes lasers

Kim Trinh Tran Thi, Zhaomin Tong, Muhammad Nadeem Akram

Proceedings Volume 8413, Speckle 2012: V International Conference on Speckle Metrology; 84131N (2012) https://doi.org/10.1117/12.978228
Event: SPECKLE 2012: V International Conference on Speckle Metrology, 2012, Vigo, Spain

Abstract

We investigated the speckle contrast reduction characterization of high power broad-area edge-emitting red and blue laser. The speckle contrast is measured with different pulse driving conditions. It can be observed from the measurement that the speckle contrast reduces with the increasing of pulse duration and pulse amplitude. The highest speckle contrast reduction that can be achieved with the red and the blue lasers is 27.9% and 10.4% respectively. The reduction of speckle contrast is due to the shift of emission wavelength and the incoherence of the laser beam at high driving current.

Citation Download Citation

Kim Trinh Tran Thi, Zhaomin Tong, and Muhammad Nadeem Akram "Speckle reduction characterization of high power broad-area edge-emitting diodes lasers", Proc. SPIE 8413, Speckle 2012: V International Conference on Speckle Metrology, 84131N (11 September 2012); https://doi.org/10.1117/12.978228

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