Research on dual-wavelength output characteristics of blue diode laser with dual Littman external cavities

IF 2.2 3区物理与天体物理 Q2 OPTICS

Optics Communications Pub Date : 2025-05-08 DOI:10.1016/j.optcom.2025.131981

Xiuzheng Wang, Changcheng Duan, Xuanyu Hu, Yongkang Xiong, Yu Xiao, Xiahui Tang, Hao Peng

{"title":"Research on dual-wavelength output characteristics of blue diode laser with dual Littman external cavities","authors":"Xiuzheng Wang, Changcheng Duan, Xuanyu Hu, Yongkang Xiong, Yu Xiao, Xiahui Tang, Hao Peng","doi":"10.1016/j.optcom.2025.131981","DOIUrl":null,"url":null,"abstract":"<div><div>In this paper, we constructed a dual Littman structure by splitting a diode laser along the slow axis to achieve a narrow-linewidth, dual-wavelength output. Both locked peaks are tunable in the wavelength and controllable in intensity ratio. With one wavelength locked at 447.23 nm at 1.5 A driving current, the tuning range of the other wavelength is from 443.92 nm to 450.61 nm. A maximum wavelength interval of 4.02 nm (6.06 THz frequency interval) between the locked peaks is observed by adjusting the angle of the mirrors and changing the energy ratio of the two feedback beams. An output power of 1.12 W is achieved when the wavelength interval is fixed at 1.4 nm, with an optical-to-optical efficiency of 51.32 %. We also found that the output energy from the external cavity was reduced when the feedback was introduced, as opposed to the free-running state. This was due to spectral hole burning, which lowered the gain of the locked wavelength. Additionally, at high injection current, the changes in the output wavelengths of the blue diode laser could influence the lateral mode distribution. This structure can also be applied to diode arrays to achieve higher-power dual-wavelength output.</div></div>","PeriodicalId":19586,"journal":{"name":"Optics Communications","volume":"589 ","pages":"Article 131981"},"PeriodicalIF":2.2000,"publicationDate":"2025-05-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Optics Communications","FirstCategoryId":"101","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0030401825005097","RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"OPTICS","Score":null,"Total":0}

引用次数: 0

Abstract

In this paper, we constructed a dual Littman structure by splitting a diode laser along the slow axis to achieve a narrow-linewidth, dual-wavelength output. Both locked peaks are tunable in the wavelength and controllable in intensity ratio. With one wavelength locked at 447.23 nm at 1.5 A driving current, the tuning range of the other wavelength is from 443.92 nm to 450.61 nm. A maximum wavelength interval of 4.02 nm (6.06 THz frequency interval) between the locked peaks is observed by adjusting the angle of the mirrors and changing the energy ratio of the two feedback beams. An output power of 1.12 W is achieved when the wavelength interval is fixed at 1.4 nm, with an optical-to-optical efficiency of 51.32 %. We also found that the output energy from the external cavity was reduced when the feedback was introduced, as opposed to the free-running state. This was due to spectral hole burning, which lowered the gain of the locked wavelength. Additionally, at high injection current, the changes in the output wavelengths of the blue diode laser could influence the lateral mode distribution. This structure can also be applied to diode arrays to achieve higher-power dual-wavelength output.

查看原文本刊更多论文

双Littman外腔蓝色二极管激光器双波长输出特性研究

在本文中，我们通过沿慢轴分裂二极管激光器来构造双利特曼结构，以实现窄线宽，双波长输出。两个锁定峰的波长可调，强度比可控。在1.5 A驱动电流下，一个波长锁定在447.23 nm，另一个波长的调谐范围为443.92 ~ 450.61 nm。通过调整反射镜的角度和改变两束反馈光束的能量比，可以观察到锁定峰之间的最大波长间隔为4.02 nm （6.06 THz频率间隔）。当波长间隔固定为1.4 nm时，输出功率为1.12 W，光效率为51.32%。我们还发现，与自由运行状态相反，当引入反馈时，外部腔的输出能量减少。这是由于光谱孔燃烧，降低了锁定波长的增益。此外，在高注入电流下，蓝色二极管激光器输出波长的变化会影响横向模分布。这种结构也可以应用于二极管阵列，以实现更高功率的双波长输出。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文求助全文

来源期刊

Optics Communications 物理-光学

CiteScore

5.10

自引率

8.30%

发文量

681

审稿时长

38 days

期刊介绍： Optics Communications invites original and timely contributions containing new results in various fields of optics and photonics. The journal considers theoretical and experimental research in areas ranging from the fundamental properties of light to technological applications. Topics covered include classical and quantum optics, optical physics and light-matter interactions, lasers, imaging, guided-wave optics and optical information processing. Manuscripts should offer clear evidence of novelty and significance. Papers concentrating on mathematical and computational issues, with limited connection to optics, are not suitable for publication in the Journal. Similarly, small technical advances, or papers concerned only with engineering applications or issues of materials science fall outside the journal scope.