- Fully remote controlled and hands-free
- Entire coverage of Raman fingerprint region 720 … 9000 cm-1
- 2 ps with 10 cm-1 spectral width, ideal for ps Coherent Raman
- Modulation of 1031 nm beam up to 20 MHz optional for video rate SRS imaging
- Extremely low noise comparable to solid state laser pumped OPOs
The picoEmerald™ platform has been the first fully automated tunable picosecond light source in the near infrared with few picosecond pulse width.
The version picoEmerald™ S is equipped with a new pump source offering shorter pulses of just 2 ps with 10 cm-1 spectral width, compared to the original picoEmerald version offering 6 ps.
The instrument is based on APE’s long standing experience in building OPOs (optical parametric oscillators) combined with its expertise in electronic control and automation making the picoEmerald™ S an everyday easy to use instrument in biological, medical, or physics labs.
The picoEmerald™ S enables the shortest pulses possible for highest signal level while maintaining best spectral resolution in ps Coherent Raman measurements. At the same time, combination with SHG and multiphoton fluorescence measurements as multimodal imaging approach is enhanced by using shorter pulses.
The picoEmerald™ S combines a picosecond OPO and its pump laser incorporated in a single housing with an integrated software control run from a Panel PC with a graphical user interface (GUI). It can be completely remote controlled by a user software or a microscope through a simple RS-232 interface. The optics´ modules are optimized by finite element analysis and mechanical stability algorithms (misalignment sensitivity optimization) to obtain maximum passive stability of the sealed OPO compartment made in a monolithic design. The RS-232 allows the integration of the picoEmerald™ S into larger software run and controlled experiments. For fast remote diagnostics, the picoEmerald™ S has service capability via the internet using a LAN interface.
|OPO Signal1||700 … 960 nm|
|Idler||1120 … 1950 nm|
|∆ν Signal – Idler||1440 … 9000 cm-1|
|∆ν Signal – 1031 nm||720 … 4500 cm-1|
|Wavelength sweep||typ. 5 s per wavelength step2|
|Signal (@ 720 … 960 nm)||> 500 mW|
|Idler (@ 1150 … 1350 nm)||> 400 mW|
|Laser fundamental @ 1031 nm||> 700 mW|
|Repetition rate||80 MHz|
|Laser fundamental @ 1031 nm||typ. 2 ps|
|OPO Signal||typ. 2 ps|
|Spectral bandwidth (Signal, 1031 beam)||< 1 nm (10 cm-1)|
|Time bandwidth product (Signal, Idler)||typ. 0.6|
|Beam waist diameter at OPO exit @ 817 nm||1.2 (± 0.2) mm|
|Beam divergency3) @ 817 + 1031 nm||1.0 (± 0.2) mrad|
|M² (OPO Signal, Idler)||< 1.2|
|M² (1031 nm)||typ. 1.2|
|Ellipticity||< 10 %|
|Pointing stability OPO Signal||< 100 µrad / 100 nm|
|Polarization||linear / horizontal > 100:1|
|Common output beam is selectable for OPO Signal and 1031 nm or OPO Signal and Idler with overlap in space and time.|
|Computer interface||USB / RS-232|
|Beam height at exit||121 mm from base|
1 The Signal range is limited to 780 … 960 nm when using “Signal only” or “Signal + 1031 nm” (limitation by the output filter).
2 Wavelength sweep is performed from selectable start to end wavelength set point with a user defined step size (max. 2 nm).
3 Beam waist position approx. 500 mm within housing.
- Amplitude modulator for 1031 nm beam1:
a) AOM up to 1.5 MHz user adjustable
b) EOM fixed to 10 or 20 MHz
- Optimized output wavelength conversion, based on HarmoniXX [ SHG and THG of OPO Signal and Idler, FHG of OPO Signal ]
- Lock-in amplifier and detector module optimized for video-rate Stimulated Raman Scattering (SRS) Microscopy
- SRGOLD add-on
1 Synchronized to the pulse train of the 1031 nm beam, with the possibility of a phase-lock
A selection of publications mentioning the use of the picoEmerald™:
Collection of selected references: APE picoEmerald Reference List
Lu Wei et al., Vibrational imaging of newly synthesized proteins in live cells by stimulated Raman scattering microscopy,
Proceedings of National Academy of Sciences, Vol. 110, Issue 28, pp. 11226-11231 (2013), Link (DOI) | Link
Fu et al., In Vivo Metabolic Fingerprinting of Neutral Lipids with Hyperspectral Stimulated Raman Scattering Microscopy,
Journal of the American Chemical Society, Vol. 136, pp. 8820-8828 (2014), Link (DOI) | Link