Photonics
The Photonics Research Laboratory at CRANN, Trinity College Dublin, is an established optical research center and a key technology platform for Ireland.
It combines unique femtosecond laser systems with different repetition rates and tunability from UV to mid-IR, a Raman Spectroscope, Scanning Near-field Optical Microscope and a Fluorescence Lifetime Imaging Microscope. At CRANN we are carrying out research related to nonlinear dynamics, nonlinear optics, ultrafast optics, near-field optics and surface Plasmon resonance.
For more information on the CRANN Photonics Laboratory and related projects please email Prof John Donegan, jdonegan AT tcd.ie.
80 MHz, 130 fs Femtosecond Laser System
System Specifications:
CW 532 nm.
80MHz, <130 fs, 700 nm-980 nm.
Pumped 500 mW@ 832 nm, SHG: 70 mW @ 416 nm.
THG: 25 mW@ 277 nm.
80 MHz, <130 fs, 525 nm-750 nm.
80 MHz, <130 fs, 1 050 nm-1600 nm (Signal).
80 MHz, <130 fs, 1600 nm-2600 nm (Idler).
100 kHz, 130 fs, Femtosecond Laser System- Medium repetition rate (100kHz), amplified, tunable laser system
System Specifications:
CW 532 nm.
780 nm-820 nm, <130 fs.
500 mW@800 nm, <130 fs.
White light output.
SHG output, 400 nm, <130 fs.
Signal 480 nm-700 nm, <130 fs.
Idler 933 nm-2300 nm, <130 fs.
Signal 1200 nm-1600 nm, <130 fs
Idler 1600 nm-2400 nm, <130 fs.
2.55 µm to >10 µm.
1 kHz, High Pulse Energy (>1 mJ) Femtosecond Laser System Low repetition rate (1kHz), short pulse, amplified, tunable laser system
System Specifications:
780 nm-820 nm, <130 fs.
800nm, Repetition Rates @1 kHz, Pulse Energy >1 mJ.
AFM+Raman Microscope+SNOM System
SNOM:
Scanning by sample |
Scanning by probe |
|
Scan range |
100x100x10 µm |
100x100x7 µm |
Non-linearity, XY |
0.1 % (typically) |
<0.15 % |
Noise level, Z |
<0.2 nm (typically) |
0.04 nm (typically) |
Noise level, XY |
<0.5 nm (typically) |
0.2 nm (typically) |
Quartz tuning fork base frequency |
190 kHz |
|
Optical fiber diameter |
90 µm (for 480 nm-550 nm) |
|
Aperture diameter |
< 100 nm |
|
Raman spectroscope:
Wavelength coverage: ~ 100 cm-1 to 9000 cm-1. Laser options: 488 nm Argon Iron Laser &, 532 nm, & 633 nm Helium-Neon Laser. Three grating options: 1200/mm, 2400/mm and 3000/mm. Spectral resolution: ~ 1 cm-1(depending on configuration).
AFM:
Scanning by sample |
Scanning by probe |
|
Scan range |
100x100x10 µm |
100x100x10 µm |
Non-linearity, XY |
0.1 % (typically) |
<0.15 % |
Noise level, Z |
<0.04 nm (typically) |
0.06 nm (typically) |
Noise level, XY |
<0.2 nm (typically) |
0.1 nm (typically) |