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Rainbow™ 2PLUG AND PLAY FEW-CYCLE OSCILLATOR
The Rainbow 2 Advantage
• Near transform-limited sub-6 fs pulses• CEP4 feed-forward technology• Constant waveform ultrashort pulses• Record-low CEP noise• Unmatched long-term stability• Optional 1030 nm output
The new Rainbow™ 2 ultrafast Ti:Sapphire oscillator offers ultimate performance and reliability in a sealed, package with state-of-the-art output parameters such as sub-6 fs pulse width, over 300 nm spectral bandwidth and output power up to >500 mW.
With Rainbow 2, Spectra-Physics draws upon Femtolasers’ technology developed for the world-renowned Rainbow in addition to its extensive experience in the production of industrial-grade ultrafast laser solutions. Rainbow 2 is an ultrafast few-cycle pulse Ti:Sapphire oscillator using Dispersive Mirror technology.
When paired with the CEP4, Femtolasers’ feed-forward Carrier Envelope Phase (CEP) stabilization, the Rainbow 2 delivers best-in-class CEP performance and is indisputably the oscillator of choice for demanding experiments requiring low-noise and reliable CEP stability.
Rainbow 2 has an optional 1030 nm output to allow direct optical seeding of Yb-based lasers which are typically used in OPCPA chains.
Rainbow 2 can also be synchronized to a reference RF source or to another oscillator with Femtolock™ 2 and yields the lowest jitter levels available from a commercial system.
Extreme ultrafast and CEP performance and user-friendly operation are now available under the banner of one laser system. The Rainbow 2 is the ideal solution for cutting edge ultrafast applications spanning from Ti:Sapphire amplifier, OPCPA seeding and attosecond science to ultrafast spectroscopy and multiphoton imaging.
Applications
• Attosecond science• Ultrafast spectroscopy• Amplifier and OPCPA seeding• Pump-probe measurements• THz spectroscopy and imaging• Optical coherence tomography• Nonlinear optics
The Rainbow 2 provides broad spectrum with >300 nm bandwidth, ideally suited for few-cycle OPCPA seeding.
Time (hours) 0 50 100 150 200 250
Wav
eleng
th (n
m)
1000
900
800
700
600
Stable and Reliable Ultrabroad Spectrum
Rainbow™ 2
www.spectra-physics.com
STATE-OF-THE-ART PERFORMANCE
High pulse quality: SPIDER measurement (5.9 fs) reveals flat phase and close to transform-limited pulses (calculated FROG trace: 5.7 fs).
Time (fs)
-60 60-40 40-20 200
Freq
uenc
y (TH
z)
550 0 π
500
450
400
350
300
250
Few-cycle Pulses - Straight from the Box
Rainbow 2 Dimensions
2.0(50.8)
11.6(294.5)
5.6(142.8)
Output End
29.5(750)
14.0(355)
Top View
Dimensions in inch (mm)
Ultimate passive oscillator stability augmented with active control loops ensuresoutstanding long-term power stability.
* Typically measured performance; not a guaranteed or warranted specification.
Outp
ut P
ower
(mW
)
510
508
506
504
502
Time (hours)
0 20 40 60 80 100
Power Stability: 0.01% (rms)0.14% (p2p)
1 mW interval
Rainbow 2 UHP Output Power Stability*
Rainbow 2 Specifications1,4
Rainbow 2 Rainbow 2 UHP
Pulse Duration <6 fs <7 fs
Bandwidth @ -10 dB >300 nm
Output Power >300 mW >500 mW
Pulse Energy >4 nJ >6.6 nJ
Peak Power >580 kW >840 kW
Central Wavelength 800 nm ±20 nm
Repetition Rate2 75 MHz (nominal)
Noise (measured at 10 Hz–100 kHz) <0.05% rms
Power Stability3 (peak-to-peak) ±0.5%
Beam Diameter (1/e²) <2.5 mm
Beam Divergence <2 mrad
Polarization >100:1 (horizontal)
Femtolock™ 2 Optional
1030 nm Output Optional
CEP4 Optional
1. Due to our continuous improvement program, specifications are subject to change without notice.2. Other repetition rates available upon request.3. Measured over 24 hours at constant environmental conditions.4. The Rainbow 2 is a Class IV – High Power Laser, whose beam is, by definition, a safety and fire hazard. Take precautions to prevent exposure to direct and reflected beams. Diffuse as well as specular reflections can cause severe skin damage.
www.spectra-physics.com
FOR THE MOST DEMANDING APPLICATIONS
Rainbow 2 CEP4 is the latest advancement in the generation of Carrier Envelope Phase-stable few-cycle pulses. The combination of the plug and play sub-6 fs ultrafast oscillator with the record-setting CEP4 stabilization provides the utmost performance in all aspects.
Lowest CEP noise, longest phase-continuous operation time and pulses with a truly constant waveform—Rainbow 2 CEP4 is the answer to demanding applications in attoscience.
Performance
CEP4, our unique feed-forward CEP stabilization technology, provides noise cancellation at a higher bandwidth than any feedback-based technology, leading to the best CEP performance commercially available.
Stability and Reproducibility
CEP4 offers a fixed phase relation between consecutive pulses without being affected by the pitfalls of traditional phase-locking techniques.
Even at lowest residual noise, CEP4 is immune to loss-of-lock events and provides continuous stable CEP. This is achieved through a simple and elegant solution rather than an increase in complexity. CEP4 stabilization is decoupled from pulse generation, and both components are the benchmark of their kind.
Rainbow 2 CEP4 is the ideal seed oscillator for CE-Phase stabilized ultrafast amplifiers. The complete Femtopower™ CEP laser system consistently provides outstanding CEP stability in a reliable and user-friendly configuration over the longest period of time.
Rainbow™ 2 CEP4
The compact and robust CEP4 module is attached directly to the sealed laser housing for maximum stability.
The residual out-of-loop CEP noise is limited by measurement noise over the entire frequency range.
CEP4 is immune to lock failures and cycle slips that would result in CEP discontinuities.
* Typical performance; not a guaranteed or warranted speciification.
Frequency (Hz)
0 100 102 104 106
Noise
Spe
ctra
l Den
sity (
rad/
Hz1/2
)
10-8
10-6
10-4
10-2
0
10
20
30
40
50
Inte
grat
ed P
hase
Noi
se (m
rad)
Time (hours)
0 2 4 6 8 10
Phas
e Erro
r (m
rad)
-750
-500
-250
0
250
500
750
50 mrad (rms) over 10 hours
CEP4: Record Setting Performance*
Feed-Forward: No Cycle Slips*
Rainbow 2 CEP4 Femtopower CEP
MultipassCPA
Slow LoopLocking
Electronics
Rainbow 2Seeder
DFG
AOFS
CEPset™
Inline f-to-2f
CEP4Feed-Forward
ElectronicsfCEO -fCEO
∆φCE
Rainbow™ 2 CEP4
A train of pulses with identical waveform is obtained without any compromise in noise performance or reliability.
Constant Waveform: fCEO=0
Oscillator Pulse Train, CEP4 Approach: fCEO=O
Sign
al
Rainbow 2 CEP4 Specifications1, 3
Rainbow 2 CEP4 Seed Rainbow 2 CEP4 Pro
Pulse Duration N/A <7 fs
Bandwidth @ -10 dB >300 nm
Output Power >100 mW >150 mW
Central Wavelength 800 nm ±20 nm
Repetition Rate2 75 MHz (nominal)
fCEO 0 Hz
CEP Stability <60 mrad rms (0.05 Hz–500 kHz) over 12 hours
Beat Signal SNR >30 dB
Femtolock 2 Optional
1030 nm Output Optional
1. Due to our continuous improvement program, specifications are subject to change without notice.2. Other repetition rates available upon request.3. The Rainbow 2 CEP4 is a Class IV – High Power Laser, whose beam is, by definition, a safety and fire hazard. Take precautions to prevent exposure to direct and reflected beams. Diffuse as well as specular reflections can cause severe skin damage.
Rainbow 2 CEP4 Dimensions
2.0(50.8)
10.3(262.5)
5.6(142.8)
Output End Top View
42.0(1067)
14.0(355)
Dimensions in inch (mm)
SP-DS-20160909
© 2016 Newport Corporation. All Rights Reserved. Spectra-Physics and the Spectra-Physics logo are registered trademarks of Newport Corporation. Rainbow, Femtopower, Femtolock and CEP are trademarks of Newport Corporation. Spectra-Physics Santa Clara, California, Stahnsdorf, Germany, Rankweil, Austria and Tel Aviv, Israel have all been certified compliant with ISO 9001.
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