Single-Mode 940 nm VCSELs with narrow divergence angles and high-power performances for fiber and free-space optical communications

Zuhaib Khan , Nikolay Ledentsov Jr. , Łukasz Chorchos , Jie-Chen Shih , Yung-Hao Chang , Nikolay N. Ledentsov , Jin-Wei Shi


Using the Zn-diffusion and oxide-relief techniques with the optimized aperture sizes, we demonstrate a novel single-mode 940 nm vertical-cavity surface-emitting laser (VCSEL) with high brightness performance. The highly single-mode (SM) output optical spectra (SMSR>50 dB) can be sustained under a full range of bias currents and from room temperature (RT) to 85°C operation. Under RT operation, the maximum SM power can be as high as 7.1 mW with a moderate threshold current (Ith : 1.1mA) and narrow divergence angles in the far-field pattern (FWHM: 5°, 1/e2: 7-8°). Furthermore, the maximum 3-dB E-O modulation bandwidth of this high-power SM VCSEL can reach 15 GHz without the low-frequency roll-off induced by spatial hole burning effect. By using this novel device as the transmitter, we can achieve 25 Gbit/sec error-free (bit-error-ratio (BER) < 1× 10-12) transmission over a 400 meter OM5 fiber without using any signal processing technique. This novel high-speed and high-brightness SM 940 nm VCSEL can serve as a light source in single-mode fiber for medium-reach (>0.3 km) data communications as well as in free-space optical communication.
Author Zuhaib Khan - National Central University (NCU)
Zuhaib Khan,,
, Nikolay Ledentsov Jr. - Vertically Integrated Systems GmbH (VIS GmbH)
Nikolay Ledentsov Jr.,,
, Łukasz Chorchos (FEIT / IT) - Vertically Integrated Systems GmbH (VIS GmbH)
Łukasz Chorchos,,
- The Institute of Telecommunications
, Jie-Chen Shih - [National Central University (NCU)]
Jie-Chen Shih,,
, Yung-Hao Chang - National Central University (NCU)
Yung-Hao Chang,,
, Nikolay N. Ledentsov - VI Systems GmbH (VIS)
Nikolay N. Ledentsov,,
, Jin-Wei Shi - National Central University (NCU)
Jin-Wei Shi,,
Journal seriesIEEE Access, ISSN 2169-3536
Issue year2020
Keywords in EnglishVertical cavity surface emitting lasers, fiber optics, data communication
ASJC Classification1700 General Computer Science; 2200 General Engineering; 2500 General Materials Science
Languageen angielski
LicenseJournal (articles only); author's original; Uznanie Autorstwa (CC-BY); after publication
2020 Chorchos Single-Mode 940 nm VCSELs With Narrow.pdf 7.23 MB
Score (nominal)100
Score sourcejournalList
ScoreMinisterial score = 100.0, 14-07-2020, ArticleFromJournal
Publication indicators Scopus Citations = 0; Scopus SNIP (Source Normalised Impact per Paper): 2018 = 1.718; WoS Impact Factor: 2018 = 4.098 (2) - 2018=4.54 (5)
Citation count*
Share Share

Get link to the record

* presented citation count is obtained through Internet information analysis and it is close to the number calculated by the Publish or Perish system.
Are you sure?