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Characterizing Far-infrared Laser Emissions and the Measurement of Their Frequencies
Published on: December 18, 2015
Near-infrared distributed feedback solgel lasers by intensity modulation and polarization modulation
Jun Wang1, Hongxing Dong, Jintai Fan
1Key Laboratory of Materials for High-Power Laser, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, China. jwang@siom.ac.cn
Applied Optics
|November 24, 2011
Summary
Researchers explored near-infrared distributed feedback (DFB) lasers using Oxazine 725 dye in thin films and bulk materials. They achieved wideband wavelength tuning and observed distinct laser behaviors based on modulation feedback mechanisms.
Area of Science:
- Materials Science
- Optics and Photonics
- Laser Physics
Background:
- Distributed feedback (DFB) lasers are crucial for tunable laser applications.
- Investigating organic dyes like Oxazine 725 in solid-state matrices is key for developing new laser sources.
- Understanding the influence of host materials (zirconia, silica) on laser performance is essential.
Purpose of the Study:
- To investigate near-infrared DFB laser actions of Oxazine 725 dye.
- To compare laser performance in zirconia thin films versus silica bulks.
- To analyze the impact of intensity and polarization modulation on laser characteristics.
Main Methods:
- Fabrication of Oxazine 725 dye-doped zirconia thin films and silica bulk samples.
- Generation of DFB lasing using intensity and polarization modulation techniques.
- Pumping with a nanosecond Nd:YAG laser at 532 nm.
- Characterization of wideband wavelength tuning and polarization properties.
Main Results:
- Achieved wideband tuning of output wavelength for both thin film (716-778 nm) and bulk (724-813 nm) lasers.
- Demonstrated successful DFB lasing using both intensity and polarization modulation.
- Observed distinct polarization characteristics and threshold energy variations between modulation methods.
Conclusions:
- Oxazine 725 dye in zirconia thin films and silica bulks can function as effective near-infrared DFB laser gain media.
- The choice of modulation technique significantly influences laser output polarization and threshold energy.
- Wideband tunability is achievable by controlling the modulation period, offering flexibility for spectroscopic applications.
