SEMICONDUCTOR DEVICES

Active multi-mode-interferometer broadband superluminescent diodes

Feifei Wang, Peng Jin, Ju Wu, Yanhua Wu, Fajie Hu and Zhanguo Wang

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 Corresponding author: Wang Feifei,Email:

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Abstract: We report a new quantum dot superluminescent diode with a new device structure. In this device, a multi-mode-interferometer configuration and a J-bend structure were monolithically integrated. Owing to the multi-mode-interferometer structure, the superluminescent diode exhibits 60% increase in output power and 43% reduction in the differential resistance compared with the uniform waveguide width superluminescent diode fabricated from the same wafer. Our device produces an emission spectrum as wide as 103.7 nm with an output power of 2.5 mW at 600 mA continue-wave injection current. This broadband emission spectrum makes the axial resolution of the optical coherence tomography system employing the superluminescent diode to 6 μ m in theory, which is high enough for most tissue imaging.

Key words: quantum dotmulti-mode-interferometersuperluminescent diode



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Fig. 1.  The schematic band diagram of chirped multiple QD structure.

Fig. 2.  The device structures of SLDs. (a) J-SLD. (b) MMI-SLD.

Fig. 3.  The I –V characteristics of the MMI-SLD and the J-SLD under CW injection current.

Fig. 4.  The P–I characteristics of the MMI-SLD and the J-SLD under CW injection current.

Fig. 5.  (a) The emission spectra of MMI-SLD and J-SLD under 200 mA CW injection current. (b) The emission spectrum of MMISLD under different CW injection currents.

Fig. 6.  The computed complex temporal coherence function with the horizontal axis being time (a) and distance (b) under the injection current of 600 mA.

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    Received: 14 June 2015 Revised: Online: Published: 01 January 2016

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      Feifei Wang, Peng Jin, Ju Wu, Yanhua Wu, Fajie Hu, Zhanguo Wang. Active multi-mode-interferometer broadband superluminescent diodes[J]. Journal of Semiconductors, 2016, 37(1): 014006. doi: 10.1088/1674-4926/37/1/014006 F F Wang, P Jin, J Wu, Y H Wu, F J Hu, Z G Wang. Active multi-mode-interferometer broadband superluminescent diodes[J]. J. Semicond., 2016, 37(1): 014006. doi: 10.1088/1674-4926/37/1/014006.Export: BibTex EndNote
      Citation:
      Feifei Wang, Peng Jin, Ju Wu, Yanhua Wu, Fajie Hu, Zhanguo Wang. Active multi-mode-interferometer broadband superluminescent diodes[J]. Journal of Semiconductors, 2016, 37(1): 014006. doi: 10.1088/1674-4926/37/1/014006

      F F Wang, P Jin, J Wu, Y H Wu, F J Hu, Z G Wang. Active multi-mode-interferometer broadband superluminescent diodes[J]. J. Semicond., 2016, 37(1): 014006. doi: 10.1088/1674-4926/37/1/014006.
      Export: BibTex EndNote

      Active multi-mode-interferometer broadband superluminescent diodes

      doi: 10.1088/1674-4926/37/1/014006
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      Project supported by the National Natural Science Foundation of China (No. 61274072) and the National High Technology Research and Development Program of China (No. 2013AA014201).

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