Thermal- and Spectral-Characteristics of High-Power Quasi-Continuous Wave 940-nm InGaAs Diode Laser Arrays
| Autor: | Masanobu Yamanaka, Tomokazu Ichii, Hirofumi Kan, Takeshi Kanzaki, Sadao Nakai, Yasukazu Izawa, Toshiyuki Kawashima |
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| Rok vydání: | 2000 |
| Předmět: |
Distributed feedback laser
Materials science Tunable diode laser absorption spectroscopy Laser diode business.industry Physics::Optics Backward diode Atomic and Molecular Physics and Optics Vertical-cavity surface-emitting laser law.invention Laser linewidth Laser diode rate equations law Optoelectronics Physics::Atomic Physics Laser power scaling business |
| Zdroj: | Optical Review. 7:520-524 |
| ISSN: | 1349-9432 1340-6000 |
| Popis: | Experimental results of the thermal and spectral characteristics of a monolithic stack of high power quasicontinuous wave 940-nm InGaAs linear laser diode arrays have been evaluated. Thermal resistance as the most important thermal parameter characterizing a high-power laser diode package was obtained using the temperature rise measured directly by a thermo-camera. A new simple and convenient technique to measure a spectral transition of the emission from laser diode arrays is proposed. Spectral chirping due to the transient thermal power dissipated during the laser pulse was observed as a time-evolution of the spectral profile; it gave a comprehensible image of the chirping behavior. Comparing the temperature rise in the diode junction with the thermal simulation, it was determined that the thermal shift of central wavelength dλ/dT was 0.21 nm/°C. Detailed performances were identified for pumping a Yb3+ doped crystalline laser, and it was verified that the laser diode arrays were satisfactory to meet pumping source requirements for coupling to Yb3+ absorption linewidth. |
| Databáze: | OpenAIRE |
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