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OG-V 開(kāi)關(guān)時(shí)間可調(diào)脈沖選擇器

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產(chǎn)品介紹OG-V開(kāi)關(guān)時(shí)間可調(diào)脈沖選擇器OG-V快脈沖選擇器系列具有可調(diào)的傳輸門時(shí)間，用于從飛秒脈沖序列中選擇相鄰脈沖組

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產(chǎn)品介紹

OG-V 開(kāi)關(guān)時(shí)間可調(diào)脈沖選擇器

OG-V快脈沖選擇器系列具有可調(diào)的傳輸門時(shí)間，用于從飛秒脈沖序列中選擇相鄰脈沖組。

The following applications might be pointed out when using pulse pickers with adjustable transmission gate time with femtosecond and picosecond lasers:

- selection of groups of adjacent pulses (bursts) from a train of pulses;
- control of regenerative amplifier operation: injection of a seed pulse into a cavity and ejection of the amplified pulse out of the cavity;
- usage as optical shutters (fast optical modulators) and Q-switch cavity applications;
- selection of single laser pulses in case of high jitter in relation to electric trigger pulse.

The OG pulse picker consists of a certain optical setup and an electronic control and power supply unit.

Optical setup of a pulse picker comprises two crossed polarizers with a Pockels cell placed in between. Pulse selection is performed with the use of the Pockels effect — a quasi-rectangular high-voltage electric pulse induces birefringence in the Pockels cell's optical crystal allowing precise rotation of the polarization plane of a certain laser pulse or a group of adjacent laser pulses depending on the duration of the high-voltage pulse (transmission window). Then this or these pulses may be separated from a train of consecutive pulses by using a polarizer.

產(chǎn)品特點(diǎn)

典型應(yīng)用

* Compatible with Ti:S and Yb-doped 20-150 MHz ultrafast oscillators

* Suitable for building Ti:S or Yb ultrafast regenerative amplifiers

* Possible wavelengths from 200 to 2700 nm

* Possible adjustable gate width from 20 ns to 10 us

* Transmission >90%

* HV amplitude up to 10 kV

* Multifunctional control unit with adjustable delay generator

* USB control, Windows software+LabView driver

* Time-Resolved Ultrafast Studies

- Pump-Probe Spectroscopy

* Material and Biological Tissue Processing

-Ultrafast Micromachining

* Laser Systems Design, Integration and Amplification

-Ultrafast Oscillator and Amplifier Pulse Selection

-Injection/Ejection of Pulses in Ultrafast Amplifier Systems

-Pulse Slicing for Contrast Increase

-OEM Integration

-Q-Switching

* Ultrafast Laser Diagnostics, Accessories and Components

-Novel Ultrafast Fiber Laser Development

-Amplifier Design

-Automation of Complex Experimental Setups

Electronic control unit of a pulse selector is built using programmable logic components and contains such built-in modules as optical and electronic synchronization, trigger pulse generation, frequency division, multi-channel delay signal generation, high-voltage drivers. The unit allows for multiple usage scenarios given below for integration in various laser setups:

- external or internal trigger;
- synchronization to optical (built-in photodetector) or electric signal;
- two independent delay channel groups, each with its trigger and synchronization signals; spare channels may be used as general purpose delay channels for triggering other experimental equipment (e.g. oscilloscopes, pump lasers, streak-cameras etc.);
- additional control modes with triggering by edge/level of an external signal or via a built-in burst generator allow formation of various output pulse patterns;
- up to 4 synchronized Pockels cells may be driven by a single electronic control unit.

OG-B系列脈沖選擇器光學(xué)模塊和控制模塊 OG系列脈沖選擇器控制模塊

	OG-F-D-...	OG-B-D-...	OG-B-B-...	OG-B-R/K-...
Electrooptic crystal	DKDP		BBO	RTP or KTP
Operational wavelength range (standard models)	510-540 nm / 700-1000 nm / 1000-1100 nm / 1250 nm		510-540 nm / 700-1000 nm / 1000-1100 nm / 1250 nm	1000-1100 nm / 1500-1600 nm / 1550+780 nm
Possible custom wavelengths	from 340 to 1280 nm		from 200 to 2200 nm	from 1000 to 2700 nm
Minimum repetition rate of picked pulses	single-shot
Maximum repetition rate of picked pulses (standard models)	1 kHz	3 kHz / 10 kHz / 50 kHz / 100 kHz	3 kHz / 10 kHz / 50 kHz / 100 kHz / 200 kHz / 1 MHz
Clear aperture	6 mm	6 mm (up to 20 mm upon request)	2.5 mm (up to 5 mm upon request)	3.5 mm (up to 10 mm upon request)
HV pulse (gate) shape	bell-shaped
HV pulse (gate) length (at level 10%)	3 ns	8 ns
Rise time (at level 10-90%)	700 ps	3.5 ns
Fall time (at level 90-10%)	2 ns	3.5 ns
Contrast⁽¹⁾	>1500:1		>700:1	>800:1
Pockels cell voltage	up to 10 kV		up to 4 kV	up to 3 kV
Optical scheme	half-wave (quarter-wave upon request)		half-wave/quarter-wave at λ<600 nm; at λ>600 nm - quarter-wave or half-wave with double crystal cell	half-wave (quarter-wave upon request)
Trigger	internal/external
Complete system transmission at central wavelength	>85% (PC + two Glan-Taylor prisms, default package) >90% (PC + a Glan-Taylor and a Rochon prism, upon request) >98% (Pockels cell only)
Input optical train repetition rate	2 MHz …150 MHz with internal or external trigger with optical or electric sync to input train; 1 Hz…2 MHz only with external trigger signal⁽²⁾
Sync source for internal trigger mode	optical/electric
Additional control modes	by edge / by level / built-in burst generator with internal or external trigger
Channel delay time	0...10 us (up to 1 ms upon request)⁽³⁾		0...1 us (up to 5 us upon request)⁽³⁾
Cooling	passive at up to 3 kHz output rate, water-cooled⁽⁴⁾ at 10 kHz and higher
(1) - energy ratio of a picked and any non-picked pulse. The given contrast values are valid for adjacent pulses; (2) - when operating with 1 Hz…2 MHz input pulse train, an external trigger signal must be used. Such a signal must lead the optical pulse by 0.25-3 us, must be rigidly in sync with the pulse to be picked and must have jitter of less than 200 ps; (3) - maximum channel delay time is defined by maximum repetition rate of picked pulses and cannot exceed the temporal distance between adjacent pulses at this frequency; (4) - the HV generator unit requires cooling to support operating temperature below 35°C. Water cooling is required when operating at output frequency of 10 kHz and more (water flow 1 L/min, water temp. 20-22°C, tap or building-scale supply may be also be used if permitted). Heating power to be dissipated does not exceed 80 W even at the highest frequencies (a water chiller is not included and may be supplied separately);