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Sample Grating Distributed Feedback Quantum Cascade Laser Array.

Yan FL, Zhang JC, Liu CW, Zhuo N, Liu F, Zhai SQ, Wang ZG - Nanoscale Res Lett (2015)

Bottom Line: A sample grating distributed feedback quantum cascade laser array aim at broad tunability and enhanced side mode suppression ratios is presented.Utilizing a sample grating dependence on emission wavelength and epitaxial side down bonding technique, the array of laser ridges exhibited three separated single mode emissions centered at 4.760, 4.721, and 4.711 μm respectively, in continuous wave at room temperature.Side mode suppression ratios of >35 dB and continuous wave output powers of >10 mW per laser ridge were obtained.

View Article: PubMed Central - PubMed

Affiliation: Key Laboratory of Semiconductor Materials Science, Institute of Semiconductors, Chinese Academy of Sciences, Beijing, 100083, China. flyan2012@semi.ac.cn.

ABSTRACT
A sample grating distributed feedback quantum cascade laser array aim at broad tunability and enhanced side mode suppression ratios is presented. Utilizing a sample grating dependence on emission wavelength and epitaxial side down bonding technique, the array of laser ridges exhibited three separated single mode emissions centered at 4.760, 4.721, and 4.711 μm respectively, in continuous wave at room temperature. Side mode suppression ratios of >35 dB and continuous wave output powers of >10 mW per laser ridge were obtained.

No MeSH data available.


Related in: MedlinePlus

The power-current-voltage (P-I-V) curves of the DFB array with HR coated facets when operated in CW at 20 °C. The size of DFB ridge is 2-mm-long and 12-um-wide. The blue ones are P-I-V curves for a FP cavity laser from the same wafer with the same size when operated in CW mode at 20 °C
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Fig2: The power-current-voltage (P-I-V) curves of the DFB array with HR coated facets when operated in CW at 20 °C. The size of DFB ridge is 2-mm-long and 12-um-wide. The blue ones are P-I-V curves for a FP cavity laser from the same wafer with the same size when operated in CW mode at 20 °C

Mentions: Figure 2 shows the power-current-voltage (P-I-V) curves of a 2-mm-long, 12-μm-wide, epitaxial side down bonded DFB ridges in the array at a temperature of 20 °C. The ridges, with the threshold current density of 0.708, 0.896, and 0.708 kA/cm2, emit up to the maximum power of 18, 12, and 9 mW, respectively. A Fabry-Perot (FP) cavity laser (the device size is the same as DFB arrays) shows a higher output power and slightly increased threshold current compared to the DFB devices. In addition, the small dynamic range and low threshold current density of the lasers may be caused by low doping level of active core since the device size was not very small [15, 16].Fig. 2


Sample Grating Distributed Feedback Quantum Cascade Laser Array.

Yan FL, Zhang JC, Liu CW, Zhuo N, Liu F, Zhai SQ, Wang ZG - Nanoscale Res Lett (2015)

The power-current-voltage (P-I-V) curves of the DFB array with HR coated facets when operated in CW at 20 °C. The size of DFB ridge is 2-mm-long and 12-um-wide. The blue ones are P-I-V curves for a FP cavity laser from the same wafer with the same size when operated in CW mode at 20 °C
© Copyright Policy - OpenAccess
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4608948&req=5

Fig2: The power-current-voltage (P-I-V) curves of the DFB array with HR coated facets when operated in CW at 20 °C. The size of DFB ridge is 2-mm-long and 12-um-wide. The blue ones are P-I-V curves for a FP cavity laser from the same wafer with the same size when operated in CW mode at 20 °C
Mentions: Figure 2 shows the power-current-voltage (P-I-V) curves of a 2-mm-long, 12-μm-wide, epitaxial side down bonded DFB ridges in the array at a temperature of 20 °C. The ridges, with the threshold current density of 0.708, 0.896, and 0.708 kA/cm2, emit up to the maximum power of 18, 12, and 9 mW, respectively. A Fabry-Perot (FP) cavity laser (the device size is the same as DFB arrays) shows a higher output power and slightly increased threshold current compared to the DFB devices. In addition, the small dynamic range and low threshold current density of the lasers may be caused by low doping level of active core since the device size was not very small [15, 16].Fig. 2

Bottom Line: A sample grating distributed feedback quantum cascade laser array aim at broad tunability and enhanced side mode suppression ratios is presented.Utilizing a sample grating dependence on emission wavelength and epitaxial side down bonding technique, the array of laser ridges exhibited three separated single mode emissions centered at 4.760, 4.721, and 4.711 μm respectively, in continuous wave at room temperature.Side mode suppression ratios of >35 dB and continuous wave output powers of >10 mW per laser ridge were obtained.

View Article: PubMed Central - PubMed

Affiliation: Key Laboratory of Semiconductor Materials Science, Institute of Semiconductors, Chinese Academy of Sciences, Beijing, 100083, China. flyan2012@semi.ac.cn.

ABSTRACT
A sample grating distributed feedback quantum cascade laser array aim at broad tunability and enhanced side mode suppression ratios is presented. Utilizing a sample grating dependence on emission wavelength and epitaxial side down bonding technique, the array of laser ridges exhibited three separated single mode emissions centered at 4.760, 4.721, and 4.711 μm respectively, in continuous wave at room temperature. Side mode suppression ratios of >35 dB and continuous wave output powers of >10 mW per laser ridge were obtained.

No MeSH data available.


Related in: MedlinePlus