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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

(a) The emission frequency of the no. 2 laser in the array as functions of the injected electrical power (scattering dots) and fitting results (straight lines) which give the parameter Rth, including the thermal resistance and the tuning coefficient β. b, c Heat dissipation simulation results of epitaxial side down and up ridges. The injected powers keep at 4.25 W, and the heat sink temperatures keep at 300 K
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Fig4: (a) The emission frequency of the no. 2 laser in the array as functions of the injected electrical power (scattering dots) and fitting results (straight lines) which give the parameter Rth, including the thermal resistance and the tuning coefficient β. b, c Heat dissipation simulation results of epitaxial side down and up ridges. The injected powers keep at 4.25 W, and the heat sink temperatures keep at 300 K

Mentions: The thermal resistance Rth of the device is deduced from the variation of the emission frequency as a function with the temperature of active region Tact. The emission frequency changes as υ = υ0 + βυТact, where β = (1/υ) (Δυ/ΔT) is the tuning coefficient, Тact = Tsink + PelecRth, where Tsink is the heat sink temperature and Pelec the injected electrical power [17]. As shown in Fig. 4a, fitting υ = υ0 + βυTsink + βυPelecRth using the experimental data of no. 2 laser in the array leads to the Rth2 of 11.4 K/W and β ~−6.49e−5 K−1. Using the same method, Rth1 and Rth3 are fitting to be 12.5 and 11.4 K/W respectively, which are typical values for InGaAs/InAlAs QCL ridges without lateral regrowth [18].Fig. 4


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)

(a) The emission frequency of the no. 2 laser in the array as functions of the injected electrical power (scattering dots) and fitting results (straight lines) which give the parameter Rth, including the thermal resistance and the tuning coefficient β. b, c Heat dissipation simulation results of epitaxial side down and up ridges. The injected powers keep at 4.25 W, and the heat sink temperatures keep at 300 K
© Copyright Policy - OpenAccess
Related In: Results  -  Collection

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

Fig4: (a) The emission frequency of the no. 2 laser in the array as functions of the injected electrical power (scattering dots) and fitting results (straight lines) which give the parameter Rth, including the thermal resistance and the tuning coefficient β. b, c Heat dissipation simulation results of epitaxial side down and up ridges. The injected powers keep at 4.25 W, and the heat sink temperatures keep at 300 K
Mentions: The thermal resistance Rth of the device is deduced from the variation of the emission frequency as a function with the temperature of active region Tact. The emission frequency changes as υ = υ0 + βυТact, where β = (1/υ) (Δυ/ΔT) is the tuning coefficient, Тact = Tsink + PelecRth, where Tsink is the heat sink temperature and Pelec the injected electrical power [17]. As shown in Fig. 4a, fitting υ = υ0 + βυTsink + βυPelecRth using the experimental data of no. 2 laser in the array leads to the Rth2 of 11.4 K/W and β ~−6.49e−5 K−1. Using the same method, Rth1 and Rth3 are fitting to be 12.5 and 11.4 K/W respectively, which are typical values for InGaAs/InAlAs QCL ridges without lateral regrowth [18].Fig. 4

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