FR-103 WS AUTO/CROSSCORRELATOR
Specifications:
- Resolution: < 2fs
- Minimum Pulsewidth: < 15fs
- Maximum Pulsewidth: ~ 300ps
- Scan Range: > 500ps '
- Sensitivity: [PavPpk]min=10-7W2 "
- Wavelength Range: 410-5000nm
- Background-free (non-collinear SHG)
- Crosscorrelation
- Fiber Coupled/ Free Space
- Computer Data Acquisition Option
' 1ns scan range w/WSR option
" w/ PMT [500-1700nm]
The FR-103WS is a dispersion-free, NL crystal auto/crosscorrelator for continuous 'real-time' monitoring of temporal width of ultrashort laser pulses. Offering unsurpassed sensitivity, wide scan range and dynamic range, it is easy to operate. The FR-103WS is ideally suited for long pulsewidths (> 100ps), but it is also capable to measure pulses as short as ~ 15fs, from any mode-locked laser over a wide spectral range, for input pulse rep rates > 500Hz*.
*input pulse rep rates > 4Hz w/ CDA option
DISPERSION-FREE, HIGH RESOLUTION
Dispersion is negligible in the FR-103WS for pulsewidths down to ~10fs. Using high reflective metallic-coated optics [the only transmissive element is an ultrathin (<1um) pellicle beamsplitter], an exceptional resolution < 2fs [limited only by the NL crystal thickness] is attained.
PARALLEL (//) MIRROR ASSEMBLY
Rapid scan, periodic optical delay is introduced by means of a parallel (//) mirror assembly.* Large delays are easily generated, with dispersion-free interferometric resolution.
WIDE SCAN RANGE/LINEARITY
With its wide scan range (~ 500ps) , the FR-103WS is ideally suited for measuring longer pulsewidths > 100ps. Its unique mechanism is designed to correct for any delay nonlinearity over such a wide scan range, resulting in an exceptional linear delay.
SLOW SCAN OPERATION
In this mode of operation of the FR-103WS, the // mirrors slow down greatly (3 selectable speeds ) over a period when the pulses on the two arms of the Michelson Interferometer set-up are overlapping. The // mirrors speed up beyond this range, to return quickly for a repetition of the cycle. This mode renders the unit suitable for 'real-time' autocorrelation of lasers with any rep rate > 500Hz. [Input rep rates can be as low as 4Hz w/ CDA option].
* Z.A.Yasa and N.M.Amer, Optics Commun., V36, 406 (1981)
HIGH SENSITIVITY & WIDE DYNAMIC RANGE
The remarkable sensitivity of the FR-103WS is demonstrated by its noise equivalent signal level of [PavPpk]min = 10-7W2 *. This is further augmented by an unprecedented dynamic range of ~104. These remarkable figures render the FR-103WS powerful for the measurement of weak satellite pulses which commonly occur with modelocked lasers:
WAVELENGTH RANGES (/BBO/KDP/IR/xxxx)
Three optimal NL crystals provide operation to ~ 5000nm. The standard unit comes with one customer specified NL crystal:
/BBO 410-600nm
/KDP 510-1100nm
/IR 850-5000nm.
These NL crystals accept vertically polarized input beams, they are BBAR coated and fundamental blocking filters are provided for their operational range. For long term reliability, a desiccators is provided to protect the crystal when not in use. The standard NL crystal thickness is customer specified (0.1mm/0.3mm/1mm), with attention to the trade-off between resolution (thinner NL crystal) and sensitivity (thicker NL crystal).
Generally, a 0.3mm crystal thickness can be considered sufficient for pulsewidths down to ~30fs. With shorter pulses, a thinner crystal is necessary. For sub 10fs pulsewidths, a custom (<25µm) NL crystal thickness will need to be specified.
/xxxx PD modules for extended IR wavelengths
The photomultiplier (PMT) in the standard FR-103WS covers the 410-1800nm operation. This range can be extended in the IR, by plug-in photodiode (PD) modules (/xxxx) which mount in front of the PMT enclosure. The PD module selections are:
/1100 1100-2200nm
/2200 2200-3400nm
/3000 3000-5000nm
Sensitivity is greatly reduced when operating with these PD modules since they lack the gain as provided by a PMT. Typically, a minimum of ~ 5mW avg. power is needed for a subpicosecond modelocked pulse, over the wavelengths covered by these modules.
* Over wavelengths 550-1700nm , PMT operation w/ 1ps integration time, and a NL crystal thickness of 1mm.
OPTIONS:
CROSSCORRELATION (/CC)
The FR-103WS has a built-in auxiliary port for crosscorrelation of two spatially separate synchronized beams. No additional optics is necessary for this mode of operation.
FIBER ADAPTER OPTION (/FA)
An optional gimbal mount with a collimator is installed over the variable input aperture of the FR- 103WS, for easy connection of fiber-coupled beams. Factory aligned, repeated connections without a need for realignment is facilitated. The /FA is easily removable for a free-space input beam. Its standard adapter is FC [FC/PC or FC/APC]. For operation at 1550nm, a PM-DSF patchcord can be attached to the /FA. The collimator of the /FA is focus adjustable to obtain good collimation if it needs to be used over greatly different wavelengths. A ƛ/2 plate holder is also provided within the /FA assembly, for users to install one for their wavelength of operation, if needed for polarization control. The /FA option can also be applied to the CC port [/FA(CC)].
COMPUTER DATA ACQUISITION OPTION (CDA)
A data acquisition board is installed in the FR-103WS/CDA, providing an interface (USB) with any PC w/ Windows OS. Its associated software allows traces to be displayed, analyzed [averaged and/or fit with typical pulseshapes (Gaussian and Sech2 )] or saved.
商品属性 [最小精度] 2fs [扫描范围] > 500ps [波长范围] 410-5000nm [Input pulse duration range] < 15fs ~ 300ps