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Tunable lasers on GaSb using the concept of binary superimposed gratings
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View: Figures


Image of FIG. 1.
FIG. 1.

(a) Schematic layout of the BSG CC device. (b) SEM of the chromium BSG patterned laterally to the RWG.

Image of FIG. 2.
FIG. 2.

Electrical and output power characteristic of the CC laser with BSG exhibiting a maximum output power per facet of 18 mW. Inset: single mode emission spectrum of the BSG CC laser taken at injection currents of 78 and 24 mA through the first and the second laser segment, respectively. The spectrum exhibits a SMSR of 33 dB.

Image of FIG. 3.
FIG. 3.

Measured emission wavelength of the BSG CC laser vs SMSR (dots) in comparison to the simulated values (line) where wavelength vs transmission intensity in arbitrary units is plotted.

Image of FIG. 4.
FIG. 4.

(a) Color-coded emission wavelength map of the fabricated BSG CC laser, where the emission wavelength is plotted vs the respective laser injection currents. The four predefined wavelengths can be clearly identified. (b) Corresponding false color plot of the value of the SMSR of laser spectra recorded at different injection currents. High SMSRs (bright areas) can be obtained for all four predefined emission wavelengths at specific segment current values.


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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Tunable lasers on GaSb using the concept of binary superimposed gratings