DL pro

Tunable diode laser available with digital control DLC pro

Tunable diode laser in patented pro design
Ultra-stable against temperatures & acoustics
With digital control DLC pro: Superior performance and remote control
Linewidth down to 10 kHz free running
Linewidth below 1 Hz possible with lock to external reference cavity

Our DL pro is the ultimate tunable diode laser. Its revolutionary mechanical design allows for both easy operation and extreme stability at the same time. It offers highest output powers, and optimized mode-hop-free tuning with a perfectly positioned virtual pivot point for the grating movement (Patents: DE 10 2007 028 499 and US 7970024). Together with the digital control DLC pro controller it shows unrivalled linewidth and drift – with the most comfortable and intuitive user interface. A software license may be purchased to enable frequency-locking features.

The DL pro HP diode laser features a special resonator design, which allows for higher single-mode output powers from "visible" laser diodes. Like the DL pro, it is an extended cavity diode laser (ECDL). Both lasers feature various modulation inputs and may be equipped with various options like fiber coupling, beam shaping etc.

With the DL pro FL locking is faster than ever laying the foundation for the next generation quantum technology. The FL variant of our DL pro features an intra-cavity EOM which provides two feedback channels. One is used for fast adjustments to ensure the superb locking performance, the other guarantees the high robustness of the lock.

We provide a wide range of Top Sellers which are turnkey solutions for typical applications such as laser cooling of atoms or ions. These systems combine a DLC pro and either a DL pro, DL pro HP or DL pro FL including an appropriate isolator. They may be combined with fiber coupling and the software license enabling frequency-locking features.

Top Sellers are available at these wavelengths:
369, 397, 399, 420, 461, 633, 637, 670, 674, 729, 780 and 850 nm.
See Additional Top Seller section below for details.

Furthermore, the DL pro is available with all laser diodes listed in our stocklist of AR-coated and Fabry-Perot laser diodes. An overview of the resulting wavelength coverage is shown in the Additional Information section below.

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Specification

	DLC DL pro	DLC DL pro HP	DLC DL pro FL
Wavelength coverage	369 .. 519 nm , 628 .. 1770 nm	369 .. 519 nm *, 633 .. 641 nm	please inquire
Typical power range	10 .. 300 mW	15 .. 250 mW after the isolator	similar to DLC DL pro
Typical coarse tuning range	2 .. 100 nm	2 .. 5 nm
Typical mode-hop free tuning range	≥ 20 GHz		≥ 5 GHz
Typical linewidth (5 µs integration time)	10 .. 300 kHz	150 .. 500 kHz	10 .. 100 kHz ****

Additional Top Seller

DLC DL pro ...	HP 369	HP 397	HP 399	HP 420	HP 461	633
Typical applications	Yb ion cooling	Ca ion cooling	Yb cooling	Ca cooling, Sr ion cooling, Rb Rydberg	Sr cooling, Cs Rydberg, K Rydberg	HeNe laser wave- length
Peak power (mW) after the isolator, specified (typical)	13	65	110	70	250	40
Wavelength (nm)	369.2 - 370.2	396.5 - 398.5	399 - 400.5	420 - 423	457 - 461	631 - 635
Linewidth (kHz @5 µs delay)	150	150	150	150	150	200
Included optical isolator	> 28 dB	> 35 dB	> 35 dB	> 35 dB	> 35 dB	> 60 dB
Polarisation	linear, PER 100:1
Polarisation axis	diagonal					vertical
Fiber coupling efficiency with FiberDock (optional), specified (typical)	55% (65%)
replacement of laser diode	in factory					by customer
Ships from stock	no	no	no	no	no	no
More power with DLC TA pro or BoosTA available	no	no	no	no	no	no
(Even) more power with DLC TA-SHG pro available	yes	yes	yes	yes	yes	yes

DLC DL pro ...	HP 637	670	FL 674	FL 729	780	850
Typical applications	NV center, Yb ion clear out laser	Li cooling and repump	Sr ion clock	Ca ion clock	Rb cooling and repump, K cooling and repump	Cs cooling, Ca ion repump
Peak power (mW) after the isolator, specified (typical)	45 (50)	25***	14	28	105 (130)**	70 (75)*
Wavelength (nm)	635 - 639	660 - 673	< 672 - 674	< 728 – > 730	765 - 805	840 - 875
Linewidth (kHz @5 µs delay)	500	200	100	60	50	100
Included optical isolator	> 35 dB	> 60 dB	> 60 dB	> 60 dB	> 60 dB	> 60 dB
Polarisation	linear, PER 100:1
Polarisation axis	diagonal	vertical	vertical	vertical	horizontal	vertical
Fiber coupling efficiency with FiberDock (optional), specified (typical)	55% (65%)
replacement of laser diode	in factory	by customer	in factory	in factory	by customer	by customer
Ships from stock	no	no	no	no	yes	yes
More power with DLC TA pro or BoosTA available	no	yes	yes	yes	yes	yes
(Even) more power with DLC TA-SHG pro available	yes	yes	no	no	no	no

* Detailed power specification after the isolator:
840 - 842 nm: > 50 mW, 842 - 850 nm: > 65 mW, 850 - 875 nm: > 70 mW, 875 - 877 nm: > 65 mW

** Detailed power specification after the isolator:
765 - 771 nm: > 40 mW, 771 - 780 nm: > 60 mW, 780 - 795 nm: > 75 mW, 795 - 800 nm: > 105 mW, 800 - 805 nm: > 75 mW

*** Detailed power specification after the isolator:
660 - 666 nm: > 15 mW, 666 - 670 nm: > 25 mW, 670 - 673 nm: > 15 mW

Additional Information

DL pro (HP): Available wavelengths and corresponding output power levels

DL pro (HP): Available wavelengths and corresponding output power levels (visible region only)

DL pro FL: Fast feedback allows to push servo bumps further away from the carrier

Frequency noise measurement DLC DL pro: Frequency noise density of the laser light created with a DLC DL pro and a SYST DL pro

Linewidth measurement DLC DL pro: Delayed self-heterodyne linewidth measurement. Due to the long coherence length periodic modulation appears. The linewidth is obtained from the modulation depth.

Options

Narrow linewidth	With this option DL pro laser systems are optimized for narrow linewidths. It is also suited for seed lasers of TA or NLO systems as well as lasers of Laser Rack Systems but not for DL pro HP lasers. DL pro FL lasers are always optimized for a narrow linewidth.
Fiber Coupling (FiberDock)	TOPTICA’s patented fiber coupler provides highest single-mode fiber-coupling efficiencies, easy alignment and at the same time highest stability. Fiber coupling efficiency of > 55% is specified for all DL pro, beam shaping optics are included if needed. TOPTICA additionally offers a wide range of single-mode and polarization-maintaining fibers, including fiber-optic beam splitters. Optical isolation is mandatory for fiber-coupled diode laser systems.
Optical Isolation	Isolators are used to protect the laser diode against back reflections. This not only prevents damage to the diode but also ensures untroubled tuning and single-frequency operation. Fiber-coupling with angle-polished fibers (both ends) requires at least a single-stage isolator (> 30 dB). Double-stage isolators are needed if reflections from the experiment into the laser are expected. Fiber-coupling with non-angle-polished fibers also requires a double-stage isolator (> 60 dB).
Beam Shaping	To shape elliptical laser beams into round profiles, either an anamorphic prism pair (APP) or cylindrical lenses are used. The compression ratio is set at the factory.
Motorization	The motorization of the coarse tuning offers manual control and operation via software interface. This option is available for most DL pro laser systems (most AR laser diodes and some FP diodes) including DL pro HP laser systems but not for DL pro FL systems. See Downloads section below.
Bias-T	The DL pro (HP) has two modulation inputs that allow current modulation frequencies of up to 150 MHz. A Bias-T allows even higher current modulation frequencies of up to several GHz, depending on the diode. It is also suited for seed lasers of TA or NLO systems. This option is not available for DL pro FL systems.
Electronics Modules	A broad variety of electronic locking modules is available for frequency stabilization.

Applications
- Atom Laser Cooling & Trapping
- Ion Laser Cooling & Trapping
- BEC
- Degenerate Fermi Gases
- Optical Clocks
- Rydberg Excitation (Rydberg Flyer for complete laser solutions)
- Optical Pumping & EIT
- Fundamental Constants
- Interferometry
- Quantum Cryptography
- Quantum Information
- Quantum Dots & Microcavities
- Magnetic Field Measurement
Downloads
Software
- For software updates and Python support of the digital laser controller please see the Downloads section on the DLC pro page.
- Mot / DL pro Software Version 1.15b: Free download of the latest MOT / DL pro software for DL pro equipped with the motorization option. The software consists of sample VIs for computerized motor control. Some VIs have been compiled to run without a LabView installation. The software is provided "as is" as an example for integrating the motor in an experiment or setup.
Technical information
- Product Brochure: Tunable Diode Lasers (please see website for latest specs!)
- Technical Drawings: DL pro (standard laser head)
  This laser head is used for all TopSellers and all DL pro HP as well as most configured DL pro.
- Technical Drawings: DL pro (long laser head)
  This longer housing is used if additional space is needed to fit the optical components into the laser head.
Literature
Application notes and publications
- Article: Lang, M. et al., Digital Revolution in Laser Control, Physics' Best (2014)
- Article: Lang, M. et al., Rauscharme Revolution, Best of (2013)
- Article: Lang, M. et al., Digitale Bedienkonzepte halten Einzug ins Laserlabor, LASER (2014)
- Application Note: Biomagnetic measurements benefit from laser know-how
- Application Note: 12 Orders of Coherence control
- Application Note: Temperature measurements above the Arctic
- Application Note: Trapping and quantum computing
- Scientific Publications: B. Sprenger et al., CaF2 whispering-gallery-mode-resonator stabilized-narrow-linewidth laser; Opt. Lett. 35, 17 (2010)
- Scientific Article (using DL pro stabilized to < 1 Hz linewidth): T. Puppe et al., Characterization of a DFG comb showing quadratic scaling of the phase noise with frequency, Optics Letters Vol. 41, Issue 8 (2016)
- Application Note: Phase and Frequency Locking of Diode Lasers
Current scientific publications mentioning TOPTICA DL pro
- click here to see them
Related Products
- MDL pro: Rack integration of DL pro, also as part of T-RACK
- DLC pro: All-digital driver electronics
- CTL: Continuously tunable diode laser
- DFB pro: Laser with DFB or DBR diodes
- TA pro: pro series ECDL with tapered amplifier
- BoosTA pro: Semiconductor amplifier for higher powers
- Frequency converted diode lasers: Extending the wavelength coverage of ECDLs
- Fiber Dock and Optical Fibers: Delivering the light of the DL pro or cleaning its spatial mode
- Laser Locking Electronics: A broad variety is available for frequency stabilization
- Numerous Photonicals, tools and helpful equipment for working with lasers, for example Fabry-Perot Interferometers or Compact Saturation Spectroscopy setups CoSy
- AR-coated Laser Diodes and Fabry-Perot Laser Diodes: See stock list for specifications of available laser power, tuning ranges and laser linewidths of these diodes if operated in a DL pro.

Typical output beam characteristics	3 mm x 1 mm	2 mm x 1 mm	3 mm x 1 mm
Typical output beam polarization	linear, > 100:1
ASE background, typ.	< -40 dB
Optical isolation	optional, see Options	built-in, > 30 dB	built-in, > 60 dB
Fiber coupling efficiency**: min. (typ.)	55 (65) %
Typical long term frequency change with room temperature	<< 100 MHz / K
Dimensions laser head (H x W x D)	90 x 90 x 240 / 300 mm³ ***	90 x 90 x 240 mm³	90 x 90 x 240 / 300 mm³ ***
Weight laser head	2.8 - 4.4 kg	2.8 - 3.5 kg	2.8 – 4.4 kg
Dimensions control unit (H x W x D)	154 x 450 x 348 mm³
Weight control unit	8.0 kg
Power supply	100 .. 240 V~, 50/60 Hz (wide range input)
Power consumption	Typ. < 35 W, max. 250 W
PC Interface (PC GUI included)	Ethernet, USB, analog control
Environmental temperature	15 - 30 °C (operating), 0 - 40 °C (storage and transport)
Environmental humidity	Non condensing

Application notes and publications

Current scientific publications mentioning TOPTICA DL pro