Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Experiment Video

Updated: May 14, 2026

Quasi-light Storage for Optical Data Packets
07:45

Quasi-light Storage for Optical Data Packets

Published on: February 6, 2014

Ultracompact, 160-Gbit/s transmitter optical subassembly based on 40-Gbit/s × 4 monolithically integrated light

Takeshi Fujisawa1, Toshio Itoh, Shigeru Kanazawa

  • 1NTT Photonics Laboratories, NTT Corporation, Morinosato Wakamiya, 3-1, Atsugi, Kanagawa, Japan. fujisawa.takeshi@lab.ntt.co.jp

Optics Express
|February 8, 2013
PubMed
Summary

Related Concept Videos

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

Core-to-core overlap enables efficient interchain charge transport beyond crystalline domains in a conjugated polymer: high fill factors in thick organic photovoltaic cells.

Chemical science·2026
Same author

Patient stratification for dose scaling in cervical cancer: a model-based analysis using image-guided adaptive brachytherapy.

Journal of radiation research·2026
Same author

Prospective evaluation of oxygen saturation endoscopic imaging for radiotherapy response in head and neck cancer.

Communications medicine·2026
Same author

Pain response to palliative intent conventional radiotherapy for painful malignant iliopsoas involvement: a multicenter retrospective study.

International journal of clinical oncology·2026
Same author

Cross-anatomical evaluation of a deep-learning auto-contouring system: qualitative, geometric, and dosimetric validation.

Journal of applied clinical medical physics·2026
Same author

Quinoid-controlled bond-length alternation enables high-mobility non-fused π-conjugated polymers.

Chemical science·2026

Researchers developed an ultracompact transmitter optical subassembly (TOSA) for high-speed data communication. This innovation enables 40-Gbit/s × 4 operation over 10-km fiber, paving the way for beyond-100-Gbit/s systems.

Area of Science:

  • Photonics and Optical Communications
  • Integrated Optics
  • Semiconductor Device Engineering

Background:

  • High-speed data communication systems require compact and efficient optical transmitters.
  • Existing transmitter optical subassemblies (TOSAs) face limitations in size and integration for beyond-100-Gbit/s applications.

Purpose of the Study:

  • To develop the first ultracompact TOSA for long-distance, beyond-100-Gbit/s data communication.
  • To demonstrate a monolithically integrated light source enabling reduced module size and high-speed performance.

Main Methods:

  • Monolithic integration of four InGaAlAs-based electroabsorption modulator integrated DFB lasers (EADFB lasers) and an optical multiplexer on a single chip.
  • Fabrication of a TOSA using the integrated chip and a three-dimensional interconnection board, achieving a volume of 1.82 cc.

More Related Videos

A Silicon-tipped Fiber-optic Sensing Platform with High Resolution and Fast Response
09:03

A Silicon-tipped Fiber-optic Sensing Platform with High Resolution and Fast Response

Published on: January 7, 2019

Related Experiment Videos

Last Updated: May 14, 2026

Quasi-light Storage for Optical Data Packets
07:45

Quasi-light Storage for Optical Data Packets

Published on: February 6, 2014

A Silicon-tipped Fiber-optic Sensing Platform with High Resolution and Fast Response
09:03

A Silicon-tipped Fiber-optic Sensing Platform with High Resolution and Fast Response

Published on: January 7, 2019

  • Evaluation of 40-Gbit/s × 4 operation over 10-km single mode fiber and assessment of electrical crosstalk.

    • Main Results:

    • Achieved a very small chip size of 2.4 × 3.3 mm² for the integrated light source.
    • Demonstrated error-free transmission at 40-Gbit/s × 4 with clear eye openings over 10-km single mode fiber.
    • Confirmed low electrical crosstalk, with a power penalty of only 1 dB compared to discrete operation.

    Conclusions:

    • The developed ultracompact TOSA is suitable for next-generation high-speed optical communication systems.
    • Monolithic integration significantly reduces TOSA size and enables high-speed, multi-lane data transmission.
    • The technology offers a viable solution for achieving beyond-100-Gbit/s data rates with improved efficiency and reduced footprint.