{"title":"通过线性腔干涉 NPE 在全调频掺铥光纤激光器中产生谐波锁模脉冲和类噪声脉冲","authors":"Siwei Peng , Xuanyi Liu , H.Y. Fu , Qian Li","doi":"10.1016/j.optlastec.2024.111848","DOIUrl":null,"url":null,"abstract":"<div><div>This study demonstrates the generation of both harmonic mode-locking (HML) and noise-like pulses (NLPs) in an all-polarization-maintaining (PM) Tm-doped fiber laser mode-locked by a linear-cavity interferometric nonlinear polarization evolution (NPE) mechanism. Adjusting the pump power and manipulating the intra-cavity pulse distribution along the axes of the PM fiber enable transitions between fundamental mode-locking, various harmonic orders, and NLPs. In the HML regime, a 19th-order harmonic soliton pulse is achieved, marking a record-breaking repetition rate of ∼229 MHz for NPE-based all-PM linear-cavity fiber lasers. Detailed analyses of pulse characteristics across different harmonic orders are presented, with the 3rd-order HML exhibiting a high supermode suppression level. The stability of 3rd-order HML operation is further confirmed through noise evaluations and long-term assessments of power and spectrum. In the NLPs regime, the output is centered at 1962 nm with a 3-dB bandwidth of ∼30 nm, achieving an average power of 284 mW and a pulse energy of ∼24 nJ. The long-term stability and noise profile of the laser are examined to ensure sustained NLPs operation. Furthermore, the influence of pump power variations on the optical properties of NLPs is investigated, revealing an increased spectral width, red-shifted spectrum, and reduced duration of coherent peaks with higher pump intensities.</div></div>","PeriodicalId":19511,"journal":{"name":"Optics and Laser Technology","volume":"181 ","pages":"Article 111848"},"PeriodicalIF":4.6000,"publicationDate":"2024-09-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Generation of harmonic mode-locked pulses and noise-like pulses in an all-PM Tm-doped fiber laser via linear-cavity interferometric NPE\",\"authors\":\"Siwei Peng , Xuanyi Liu , H.Y. Fu , Qian Li\",\"doi\":\"10.1016/j.optlastec.2024.111848\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><div>This study demonstrates the generation of both harmonic mode-locking (HML) and noise-like pulses (NLPs) in an all-polarization-maintaining (PM) Tm-doped fiber laser mode-locked by a linear-cavity interferometric nonlinear polarization evolution (NPE) mechanism. Adjusting the pump power and manipulating the intra-cavity pulse distribution along the axes of the PM fiber enable transitions between fundamental mode-locking, various harmonic orders, and NLPs. In the HML regime, a 19th-order harmonic soliton pulse is achieved, marking a record-breaking repetition rate of ∼229 MHz for NPE-based all-PM linear-cavity fiber lasers. Detailed analyses of pulse characteristics across different harmonic orders are presented, with the 3rd-order HML exhibiting a high supermode suppression level. The stability of 3rd-order HML operation is further confirmed through noise evaluations and long-term assessments of power and spectrum. In the NLPs regime, the output is centered at 1962 nm with a 3-dB bandwidth of ∼30 nm, achieving an average power of 284 mW and a pulse energy of ∼24 nJ. The long-term stability and noise profile of the laser are examined to ensure sustained NLPs operation. Furthermore, the influence of pump power variations on the optical properties of NLPs is investigated, revealing an increased spectral width, red-shifted spectrum, and reduced duration of coherent peaks with higher pump intensities.</div></div>\",\"PeriodicalId\":19511,\"journal\":{\"name\":\"Optics and Laser Technology\",\"volume\":\"181 \",\"pages\":\"Article 111848\"},\"PeriodicalIF\":4.6000,\"publicationDate\":\"2024-09-24\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Optics and Laser Technology\",\"FirstCategoryId\":\"101\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S0030399224013069\",\"RegionNum\":2,\"RegionCategory\":\"物理与天体物理\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q1\",\"JCRName\":\"OPTICS\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Optics and Laser Technology","FirstCategoryId":"101","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0030399224013069","RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"OPTICS","Score":null,"Total":0}
Generation of harmonic mode-locked pulses and noise-like pulses in an all-PM Tm-doped fiber laser via linear-cavity interferometric NPE
This study demonstrates the generation of both harmonic mode-locking (HML) and noise-like pulses (NLPs) in an all-polarization-maintaining (PM) Tm-doped fiber laser mode-locked by a linear-cavity interferometric nonlinear polarization evolution (NPE) mechanism. Adjusting the pump power and manipulating the intra-cavity pulse distribution along the axes of the PM fiber enable transitions between fundamental mode-locking, various harmonic orders, and NLPs. In the HML regime, a 19th-order harmonic soliton pulse is achieved, marking a record-breaking repetition rate of ∼229 MHz for NPE-based all-PM linear-cavity fiber lasers. Detailed analyses of pulse characteristics across different harmonic orders are presented, with the 3rd-order HML exhibiting a high supermode suppression level. The stability of 3rd-order HML operation is further confirmed through noise evaluations and long-term assessments of power and spectrum. In the NLPs regime, the output is centered at 1962 nm with a 3-dB bandwidth of ∼30 nm, achieving an average power of 284 mW and a pulse energy of ∼24 nJ. The long-term stability and noise profile of the laser are examined to ensure sustained NLPs operation. Furthermore, the influence of pump power variations on the optical properties of NLPs is investigated, revealing an increased spectral width, red-shifted spectrum, and reduced duration of coherent peaks with higher pump intensities.
期刊介绍:
Optics & Laser Technology aims to provide a vehicle for the publication of a broad range of high quality research and review papers in those fields of scientific and engineering research appertaining to the development and application of the technology of optics and lasers. Papers describing original work in these areas are submitted to rigorous refereeing prior to acceptance for publication.
The scope of Optics & Laser Technology encompasses, but is not restricted to, the following areas:
•development in all types of lasers
•developments in optoelectronic devices and photonics
•developments in new photonics and optical concepts
•developments in conventional optics, optical instruments and components
•techniques of optical metrology, including interferometry and optical fibre sensors
•LIDAR and other non-contact optical measurement techniques, including optical methods in heat and fluid flow
•applications of lasers to materials processing, optical NDT display (including holography) and optical communication
•research and development in the field of laser safety including studies of hazards resulting from the applications of lasers (laser safety, hazards of laser fume)
•developments in optical computing and optical information processing
•developments in new optical materials
•developments in new optical characterization methods and techniques
•developments in quantum optics
•developments in light assisted micro and nanofabrication methods and techniques
•developments in nanophotonics and biophotonics
•developments in imaging processing and systems