Fiber Lasers

& Photonic Device Lab.

Welcome to FLPD!

We are interested in advanced ultrafast fiber lasers/amplification systems, various nonlinear optical phenomena and nano photonic devices based on low dimensional materials such as carbon nanotube (CNT), graphene, and transition metal dichalcogenides (TMDs) for the applications to the military, display/semiconductor industry and optical communications.

Job Opening


- 양자광학, 레이저 광학 및 비선형 광학 관련 연구에 관심 있는 학부 연구생, 석사 및 박사 과정 학생을 모집합니다. 관심 있는 학생들은 염동일 교수님에게 이메일 (diyeom@ajou.ac.kr) 주시기 바랍니다.

- We are looking for graduate and undergraduate students who are interested in quantum optics, laser physics and nonlinear optics. Please contact Prof. Dong-Il Yeom by email (diyeom@ajou.ac.kr).


Lab. News


  • 2021.11

Jungseok Choi (M.SC Student) won an outstanding student oral presentation award in 2021 The Korean Physical Society (KPS) fall Meeting!

- Title: Study of second-order optical nonlinearity in twisted few-layer graphene

(뒤틀려 적층된 수 층 그래핀에서의 이차 비선형성 연구)

- Look at https://www.ajou.ac.kr/kr/ajou/news.do?mode=view&articleNo=114562

  • 2021. 06

The 1st EX(NL)O BRL workshop was held on June 23, 2021.

제 1회 EX(NL)O BRL 워크샵을 2021년 6월 23일 개최하였습니다.

  • 2021.06

Our group was selected as the "Basic Research Lab. " with Complex Oxide Physics Lab., Computational Quantum Materials Lab., and Optoelectronics & Quantum Materials Laboratory in Ajou university!

과학기술정보통신부 및 한국연구재단 주관 "2021년도 집단연구지원사업 기초연구실 신규 과제" 에 최종 선정되었습니다.

- 연구실명: 원자수준 계면제어 극한 비선형광학 기초연구실 (Extreme Nonlinear Optics Basic Research Lab. [EX(NL)O BRL])

- Related articles featured in several newspapers:

[중앙일보] https://news.joins.com/article/24074678

[e- 대학저널] https://www.dhnews.co.kr/news/articleView.html?idxno=141708

[이데일리] https://www.edaily.co.kr/news/read?newsId=02387846629078440&mediaCodeNo=257

  • 2021.05

Seongju Ha (Ph. D. Student) won an outstanding student paper award (우수학생논문상) in 20th Advanced Lasers and Their Applications (ALTA 2021)!

- Title: Study of enhanced third-order optical nonlinearity by Moire superlattice in twisted bilayer graphene

(무아레 초격자에 의한 뒤틀린 두 층 그래핀의 증대된 삼차 비선형 광특성 연구)

  • 2021.02

Our recent work was published in Light: Science & Applications (IF = 13.714, IF(%) = 2.577)!

우리 그룹의 연구 결과가 <빛: 과학과 응용, IF=13.714, IF(%)=2.577> 1월 21일자 온라인판에 게재되었습니다.

- Look at https://www.nature.com/articles/s41377-020-00459-5!


- Related articles featured in several newspapers:

[e-대학저널] https://www.dhnews.co.kr/news/articleView.html?idxno=136061

[뉴시스] https://newsis.com/view/?id=NISX20210201_0001325658

[헤럴드경제] http://news.heraldcorp.com/view.php?ud=20210201000730

[경인일보] http://www.kyeongin.com/main/view.php?key=20210201010000011

  • 2020.05

Prof. Dong-Il Yeom was selected as 'Ajou Top Researcher(2019학년도 연구 우수 교수)'!

- Look at https://www.ajou.ac.kr/kr/ajou/news.do?mode=view&articleNo=77720&article.offset=144&articleLimit=12!


  • 2020.05

Prof. Dong-Il Yeom received '2019 Teaching Award(2019학년도 교육 우수상)' from Ajou university!

- Look at https://www.ajou.ac.kr/kr/ajou/news.do?mode=view&articleNo=77719&article.offset=144&articleLimit=12!

  • 2019.04

Seongju Ha (Ph. D. Student) received an outstanding student paper award (우수발표상) in 2019 The Korean Physical Society (KPS) Spring Meeting!

- Title: Study of third-order nonlinear optical response in stacked graphene layer

  • 2019.02

Prof. Dong-Il Yeom won 9th Haelym-photonic engineering award (해림광자공학상, 제9호) from Optical Society of Korea (OPK)!

  • 2018.05

Jaedeok Park (M.S. Student) got an outstanding student paper award (우수학생논문상) in Advanced Lasers and Their Applications (ALTA 2018)!

- Title: All-fiber Tm-Ho codoped laser operating at 1700nm (1700nm에서 발진하는 전-광섬유 툴륨-홀뮴 첨가 광섬유 레이저)

  • 2018.04

Seongju Ha (Ph. D. Student) received an outstanding student paper award (우수발표상) in 2018 The Korean Physical Society (KPS) Spring Meeting!

- Title: All-optical fiber modulator assisted by photo-thermal effect in graphene layer (그래핀의 광열효과를 기반으로 한 전광(all-optical) 광섬유 변조기)

  • 2018.02

Prof. Dong-Il Yeom, Nam Hun Park (Ph. D. Student) and Seongju Ha (M.S. Student) attened and had an oral presentation in Photonics West 2018 (PW 2018)!

- Title/N.H. Park: All-fiber graphene-based electro-optic modulators with non-resonant large modulation depth

- Title/S. Ha: Highly efficient all-optical in-line modulator assisted by photo-thermal effect in monolayer graphene

  • 2018.02

Dr. Hwanseong Jeong (M.S/Ph. D. Integrated course, 2011-2017) joined Agency for Defense Development (ADD)! Congratulations!!


  • 2017.08

Our group paper was selected as Editors' Picks Collection for significant contributions in Nonlinear Optics for 40th Anniversary!

- Look at https://www.osapublishing.org/ol40/editorspicks_Nonlinear_Optics.cfm!


  • 2017.05

Nam Hun Park (Ph. D. Student) got an outstanding student paper award (우수학생논문상) in Advanced Lasers and Their Applications (ALTA 2017)!

- Title: All-fiber graphene-based electro-optic modulators with non-resonant large modulation depth

(감쇄파의 상호작용 기반의 높은 변조세기를 가지는 그래핀-광섬유 전광 (electro-optic) 변조기)

  • 2016.07

Hwanseong Jeong (M.S/Ph. D. Integrated Student) and Taekgyu Lee (M.S. Student) won an outstanding student paper award (우수논문상) in Optical Society of Korea Summer Meeting 2016!

- Title/T. Lee: Ultrafast fiber lasers using a graphene saturable absorber on the side-polished polarization maintaining fiber

- Title/H. Jeong: Passively Q-switched normal dispersion high power ytterbium-doped fiber laser (~200mW) based on graphene satuarble absorber (그래핀 포화 흡수체 기반 고출력 (~200 mW) 정상 분산 수동 모드 잠금 이터븀 전광섬유 레이저)

  • 2015.04

Our latest work was published in Nature Communications!

- Look at https://www.nature.com/articles/ncomms7851!

  • 2014.04

Our group paper was selected as most highly cited paper in Optics Letters over the last 7 years!

- Look at https://www.osapublishing.org/ol/fulltext.cfm?uri=ol-33-7-660&id=156154!

*Last updated on 2021.12