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OG-B/F固定门开启时间的脉冲选择器

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产品型号OG-B/F

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产品简介

产品介绍OG-B/F固定门开启时间的脉冲选择器具有固定门打开时间的电光脉冲选择器系统可以从飞秒脉冲序列中选择单个脉冲，用于许多应用场合

详细介绍

产品介绍

OG-B/F固定门开启时间的脉冲选择器

具有固定门打开时间的电光脉冲选择器系统可以从飞秒脉冲序列中选择单个脉冲，用于许多应用场合。该系统还用于超快激光放大器系统的注入/发射，以及提高放大器的对比度。

产品特点

典型应用

* Compatible with Ti:S and Yb-doped 20-150 MHz ultrafast oscillators
* Suitable for building Ti:S or Yb ultrafast regenerative amplifiers
* Possible operating wavelengths from 200 to 2700 nm
* Rise time down to 700 ps
* Excellent contrast ratio of >1500:1
* Transmission of complete system >90%
* 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

An electro-optic modulator (EOM) is a pulse selection device based on the Pockels electro-optic effect. Electric field applied to an optical medium induces birefringence and allows fast selection of passing laser pulses. Thus, such a device might be used as a fast pulse picker solution.

Electro-optic pulse pickers with fixed gate duration are widely used in the following applications:

- picking of single laser pulses from a train of pulses;
- reduction of repetition rate of laser pulses;
- building regenerative laser amplifiers: injection of seed pulses into amplifier cavity and ejection of amplified pulses out of amplifier cavity;
- pulse slicer, i.e. output amplified pulse contrast improvement via cleaning of "parasitic" pulses.

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 short 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. Then this pulse may be separated from a train of consecutive pulses by using a polarizer. Since the response time of the Pockels effect is very short, such a unit is suitable for working with dense pulse trains and ultrashort laser pulses.

	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);