研究目的
Investigating a method to regulate the single-mode lasing intensity of semiconductor lasers without causing a wavelength shift.
研究成果
The study demonstrates a novel method for regulating single-mode lasing intensity in semiconductor lasers without wavelength shift, using a DMD for optical feedback. The method offers high regulation speed and stability, outperforming conventional current injection methods. However, its effectiveness is limited at higher rotation ratios due to the DMD's structural properties.
研究不足
The method's effectiveness diminishes when the DMD rotation ratio exceeds 62.5%, as the DMD's periodic structure weakens, affecting single-mode selection performance. Additionally, the real reflectivity of the DMD does not reach 100% due to structural gaps between micro mirrors.
1：Experimental Design and Method Selection:
The study employs a digital micro-mirror device (DMD) as an adjustable two-dimensional grating to regulate the lasing peak wavelength and intensity.
2：Sample Selection and Data Sources:
An InAs/GaAs quantum dot (QD) laser diode is used, with spectrums measured using a Fourier transform infrared (FTIR) spectrometer.
3：List of Experimental Equipment and Materials:
Includes a laser diode, two lenses, a DMD (Texas
4：7XGA DDR), and a FTIR spectrometer (Nicolet 760). Experimental Procedures and Operational Workflow:
The DMD's rotation ratio is adjusted to vary optical feedback, with the laser's output measured at different settings.
5：Data Analysis Methods:
The relationship between DMD settings and laser output characteristics is analyzed to understand the regulation mechanism.
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