研究目的
Investigating the relationship between grating features (diffraction efficiency and groove density) and the side mode suppression ratio (SMSR) in external cavity diode lasers (ECDLs) to achieve ultra-high SMSR and wide tunable range around 1550 nm.
研究成果
The performance of the external-cavity laser can be significantly improved by increasing the groove density of the grating in the Littrow configuration. A grating with 1200 lines/mm and a first-order diffraction efficiency of 91% achieved a maximum SMSR of 65 dB and a tunable range of 209.9 nm. The results demonstrate that proper high grating groove number and first-order diffraction efficiency are crucial for enhancing laser performance.
研究不足
The study is limited to the specific grating parameters and configurations tested. The influence of other grating features or configurations on the laser performance was not explored. Additionally, the practical application of the ECDL in high-dynamic-range testing and measurement may require further optimization.
1：Experimental Design and Method Selection:
Three configurations with different grating parameters (diffraction efficiency and groove density) were constructed to investigate their influence on the SMSR and tunable range of the ECDL.
2：Sample Selection and Data Sources:
A commercial gain chip (Thorlabs, SAF1126H heatsink assembly) was used as the laser source. Optical spectra were measured by an optical spectrum analyzer (OSA, YOKOGAWA, AQ6370D).
3：List of Experimental Equipment and Materials:
Gain chip (Thorlabs, SAF1126H), aspherical lens (Thorlabs, 355660-C), diffractive gratings (Thorlabs, GR13-0616 and GR13-1208), power meter (Thorlabs, S146C).
4：Experimental Procedures and Operational Workflow:
The gain chip was cooled by a thermoelectric cooler (TEC) to 20°C. The output beam was collimated and diffracted on the surface of a diffractive grating mounted in Littrow configuration. The first order diffractive beam was fed back into the gain chip.
5：Data Analysis Methods:
The optical spectra and output power were measured and analyzed to determine the SMSR and tunable range.
独家科研数据包，助您复现前沿成果，加速创新突破
获取完整内容-
SAF1126H heatsink assembly
SAF1126H
Thorlabs
Gain chip used as the laser source in the ECDL system.
暂无现货
预约到货通知
-
Aspherical lens
355660-C
Thorlabs
Collimates the output beam from the rear facet of the gain chip.
立即获取同款设备
-
Diffractive grating
GR13-0616
Thorlabs
Used in configurations A and B to diffract the collimated beam.
暂无现货
预约到货通知
-
Diffractive grating
GR13-1208
Thorlabs
Used in configuration C to diffract the collimated beam.
暂无现货
预约到货通知
-
Power meter
S146C
Thorlabs
Measures the output power of the ECDLs.
暂无现货
预约到货通知
-
Optical spectrum analyzer
AQ6370D
YOKOGAWA
Measures the optical spectra of the ECDL system.
立即获取同款设备 -
登录查看剩余4件设备及参数对照表
查看全部
