Photonic Integrated Fully Tunable Comb Generator Cascading Optical Modulators Articles uri icon

publication date

  • October 2018

start page

  • 5685

end page

  • 5689


  • 23


  • 36

International Standard Serial Number (ISSN)

  • 0733-8724

Electronic International Standard Serial Number (EISSN)

  • 1558-2213


  • We report the first monolithic InP photonic integrated comb generator made by cascading optical modulators. The device is extremely compact and tunable both in repetition frequency and wavelength, making real-world applications possible. A distributed Bragg reflector laser, a Mach-Zehnder intensity modulator, and two phase modulators are monolithically integrated on a 4.5 x 2.5 mm(2) chip that also includes a booster semiconductor optical amplifier at the output. Modulators integrated on the circuit have a 3 dB bandwidth of 7 GHz and can generate up to 28 comb lines within a 5 dB power range when properly electrically driven (here demonstrated in the range 4-5 GHz). Operation up to 10 GHz is also reported.


  • Optics


  • comb generation; inp monolithic photonic integration; integrated optics; optical modulation; semiconductor optical amplifiers; generators; phase modulation; bandwidth; photonics