Near-threshold spectral and modal characteristics of a curved-grating quantum-well distributed-feedback laser

Boucher, Yann; Deryagin, A. G.; Kuchinskiĭ, V. I.; Sokolovskiĭ, G. S.

doi:10.1088/0957-4484/14/6/309

Cited by 4 publications

(1 citation statement)

References 8 publications

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“…Stimulated emission with a narrow spectrum is already taking place for pumping fluence between 0.60 and 0.70 mJ/cm 2 . The resulting "soft" threshold is sometimes observed in DFB lasers made of high-gain thin films and is an indication that a significant amount of spontaneous emission is coupled into the laser mode [22]. The emission wavelength of our lasers can be set at the design stage by fine-tuning the cavity parameters such as grating periodicity and/or the gain material thickness.…”

Section: Photoluminescence and Amplified Spontaneous Emissionmentioning

confidence: 93%

Nanosecond colloidal quantum dot lasers for sensing

Guilhabert¹,

Foucher²,

Haughey³

et al. 2014

Opt. Express

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Low-threshold, gain switched colloidal quantum dot (CQD) distributed-feedback lasers operating in the nanosecond regime are reported and proposed for sensing applications for the first time to the authors' knowledge. The lasers are based on a mechanically-flexible polymeric, second order grating structure overcoated with a thin-film of CQD/PMMA composite. The threshold fluence of the resulting lasers is as low as 0.5 mJ/cm² for a 610 nm emission and the typical linewidth is below 0.3 nm. The emission wavelength of the lasers can be set at the design stage and laser operation between 605 nm and 616 nm, while using the exact same CQD gain material, is shown. In addition, the potential of such CQD lasers for refractive index sensing in solution is demonstrated by immersion in water.

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Section: Photoluminescence and Amplified Spontaneous Emissionmentioning

confidence: 93%