TOPOL. Femtosecond Optical Parametric Oscillator

Ultrafast optical parametric laser oscillators offer broad tuning range in the near-IR range up to mid-IR wavelengths.
  TOPOL-1050-C TOPOL-1050-D TOPOL-1050-E
Optical parametric oscillator specifications
Wavelength tuning range*
(fully automated USB tuning)
680-1000 nm (signal)
1100-2200 nm (idler*, optional)
1700-2000 nm (signal)
2200-2740 nm (idler)
1400-1700 nm (signal)
2750-4200 nm (idler)
Average output optical power signal
680 nm: 300 mW
690 nm: 400 mW
700 nm: 650 mW
730 nm: 700 mW
750 nm: 700 mW
800 nm: 700 mW
850 nm: 700 mW
900 nm: 600 mW
950 nm: 400 mW
1000 nm: 300 mW

idler (optional)
1100 nm: 360 mW
1200 nm: 460 mW
1300 nm: 440 mW
1400 nm: 420 mW
1500 nm: 380 mW
1700 nm: 350 mW
1900 nm: 300 mW
2000 nm: 260 mW
2100 nm: 200 mW
2200 nm: 100 mW

1050+/-5 nm (fixed)**: >1.5 W
(>7 W switchable)
525+/-2 nm (fixed): >100 mW (>3 W switchable)

signal
>400 mW @ 1700 nm
>800 mW @ 1800 nm
>550 mW @ 1900 nm
>700 mW @ 2000 nm

idler
>300 mW @ 2200 nm
>500 mW @ 2300 nm
>400 mW @ 2400 nm
>400 mW @ 2500 nm
>300 mW @ 2700 nm

signal
>400 mW @ 1400 nm
>500 mW @ 1410 nm
>800 mW @ 1500 nm
>500 mW @ 1600 nm
>500 mW @ 1700 nm

idler
>100 mW @ 2750-4200 nm

Pulse duration (FWHM) <200 fs
(typical 140-180 fs depending on exact wavelength)
<180 fs (signal)
<150 fs (idler)
<200 fs (signal)
<250 fs (idler)
Physical specifications
Dimensions (LxWxH) laser head: 1055x520x150 mm (incl. integrated pump laser and control electronics)
closed-loop chiller unit: 443x484x176 mm (19’’ 4U)
Integrated pump laser
Average power 7...8 W at 1050+/-5 nm (fixed)
3...4 W at 525+/-2 nm (fixed)
>3 W at 1050+/-5 nm (fixed)
Pulse duration <200 fs
Pulse repetition rate 80+/-5 MHz (fixed)
Power supply, control and cooling specifications
Power supply single-phase; 100-240 V, 50/60 Hz, 1 А max
Control USB interface, Windows PC software included
Cooling system closed-loop stabilized water chiller is supplied with the unit;
(a single chiller unit is used when supplying bundled ТЕМА pump laser and the TOPOL system)
* - optional harmonic extensions are available down to 340 nm;
** - may be used to pump an additional TOPOL-1050-D or TOPOL-1050-E system

The TOPOL series of automated femtosecond optical parametric oscillators (OPOs) offers the widest wavelength tuning range among the entire product line of our company. The TOPOL series includes three models (1050-C, 1050-D and 1050-E), each providing simple and reliable management of the system parameters with the help of an advanced control software and, if combined, covering the spectral range of 680...4200 nm, with optional external SHG add-ons extending the range down to 340 nm and DFG modules for >4200 nm coverage.

Depending on the model, a TOPOL OPO can be pumped by either the fundamental (1050-D, 1050-E) or the second harmonic (1050-C) of a mode-locked femtosecond laser with the central wavelength of 1030-1060 nm and the pulse repetition rate of about 80 MHz. By default, all TOPOL OPOs are optimized for use with the TEMA-150 femtosecond ytterbium laser system, which allows achieving high average output power of about 1 W or even more at any wavelength within the three different tuning ranges spanning across the NIR and MIR spectral regions.

The main difference between the 1050-C, 1050-D and 1050-E is the wavelength tuning range specific to each model (refer to the Specifications chart for detailed information). All three OPOs provide two separate, simultaneously functioning outputs: the signal wave output and the idler wave output. Optional outputs are also available for depleted pump radiation (@ 1030 - 1060 nm), as well as its second harmonic (@ 515 - 530 nm), which can be used simultaneously with the main outputs. High-power switchable outputs of full pump radiation are also available in certain models.

The TOPOL-1050-C model features a built-in second harmonic generator module for pump radiation as well as a thermo-stabilized breadboard, which not only provides outstanding long-term stability of the output power, characteristic to 1050-D and 1050-E models, but also ensures high pump beam conversion efficiency over extended periods of time.

The TOPOL-1050-C series OPO system includes a built-in microcontroller unit and an integrated spectrometer bundled together with a specially designed TOPOL Control Software (‘TCS’) for Windows, allowing the single-click approach to wavelength tuning of the OPO. Besides providing the wavelength tuning functionality, the TOPOL Control Software allows to:
- display the wavelength of the signal wave output measured by the built-in spectrometer in real time;
- measure and display the real-time output power of the OPO;
- save signal wave spectrum to a file.

The TOPOL OPO grants its user convenient control over the parameters of the output radiation, providing high stability and repeatability of these parameters at the same time. Thanks to the robust design and high degree of automation, the TOPOL OPO allows the user to focus on the primary research task by minimizing the need for maintenance and manual adjustment of the OPO system itself.

TEMA-150 femtosecond pump laser;
- auxiliary 1050-nm pump laser output;
- auxiliary 525-nm pump SH output (in certain models);
- adaptation to other pump laser parameters (PRR 50...100 MHz).

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