Higher-order modulations of fs laser pulses for GHz frequency domain photon migration system

Huang Yi Lin, Nanyu Cheng, Sheng Hao Tseng, Ming Che Chan

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)


Except the fundamental modulation frequency, by higher-orderharmonic modulations of mode-locked laser pulses and a simple frequency demodulation circuit, a novel approach to GHz frequency-domain-photonmigration (FDPM) system was reported. With this novel approach, a wideband modulation frequency comb is available without any external modulation devices and the only electronics to extract the optical attenuation and phase properties at a selected modulation frequency in FDPM systems are good mixers and lock-in devices. This approach greatly expands the frequency range that could be achieved by conventional FDPM systems and suggests that our system could extract much more information from biological tissues than the conventional FDPM systems. Moreover, this demonstration will be beneficial for discerning the minute change of tissue properties.

Original languageEnglish
Pages (from-to)3950-3958
Number of pages9
JournalOptics Express
Issue number4
Publication statusPublished - 2014 Feb 24

All Science Journal Classification (ASJC) codes

  • Atomic and Molecular Physics, and Optics


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