Large and tunable optoelectronic chromatic dispersion in PIN-type photodiodes

Ayuushi Dutta, Egor Liokumovitch, Ziv Glaser, Shmuel Sternklar

Research output: Contribution to journalLetterpeer-review


It is known that PN-type photodiodes possess high optoelectronic chromatic dispersion (OED). Here we present a theoretical and experimental study of OED in PIN-type photodiodes. Applying the modulation phase-shift technique, a Ge PIN photodiode exhibits ∼0.5 deg/nm phase-shift sensitivity at 10 MHz modulation, corresponding to a dispersion of 1.4 × 109 ps/(nm × km), many orders of magnitude larger than high-dispersion optical materials such as chalcogenide glass. A striking feature of the PIN device is the ability to tune the amount and sign of the OED through the bias voltage. Electronic tuning between −0.8 deg/nm and +0.5 deg/nm is shown. The PIN photodiode is an on-chip device possessing significant tunable dispersion for applications in optical sensing and spectroscopy.

Original languageEnglish
Pages (from-to)2057-2060
Number of pages4
JournalOptics Letters
Issue number8
StatePublished - 15 Apr 2024


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