Ultrafast saturable absorption devices incorporating efficiently electrosprayed carbon nanotubes
- Ultrafast saturable absorption devices incorporating efficiently electrosprayed carbon nanotubes
- 추수호; 한원석; 김일두; 한영근; 이관일; 이상배; 송용원
- pulsed laser; mode-locking; carbon nanotubes; electrospray
- Issue Date
- Applied physics letters
- VOL 96, NO 5, 051111-1-051111-3
- We demonstrate saturable absorption operation of single-walled carbon nanotubes CNTs deposited
by an efficient electrospray process that provides target-localized deposition with a homogeneous
dispersion of the nanomaterials. An improvement in deposition efficiency of 95% is achieved. CNT
dispersion/deposition conditions are optimized for suppressed CNT agglomeration, thereby
maximizing the nonlinear absorption of CNTs. An ultrafast saturable absorber is formed with
side-polished fiber as a substrate for evanescent field interaction of propagated light with CNTs. A
resultant fiber mode-locked laser is realized. The laser has output with an estimated pulse duration
and repetition rate of 190.9 fs and 3.95 MHz, respectively.
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