Optical link system (NIM) High frequency reference signal transmission/reception system for J-PARC linac & SuperKEKB-WSM‑NIM‑1 (sending) /WRU‑NIM-1 (receiving)

Optical link system (NIM) High frequency reference signal transmission/reception system for J-PARC linac & SuperKEKB
Graviton Co., Ltd.

About This Product

The J-PARC proton linac distributes a 972MHz RF reference signal to each klystron drive station via optical transmission.

The phase of the accelerating electric field (972MHz) must be within ±1, and the amplitude fluctuation must be within ±1%, so the stability required for the reference signal is extremely strict. Phase fluctuation is ±0.3° (approximately ±0.9ps at 972MHz) Equipment that meets the following specifications is required.

WSM-NIM-1 and WRU-NIM-1 are NIM standard compliant versions of optical component systems (E/O_Module&O/E_Module) that have excellent temperature characteristics and minimize transmission jitter to meet strict requirements.

Main features
■Transmission side: Wavelength Stabilized Laser ModuleWSM-NIM-1 is a NIM standard compliant version that incorporates our E/O_Module WSM-2, which was developed as a light emitting module for a reference signal transmission device to the linac acceleration cavity. This E/O_Module is used in combination with our O/E_Module, WRU-NIM-1, to achieve low jitter of less than 1ps rms.

■Receiving side: 3Gbps O/E Receiver ModuleWRU-NIM-1 on the receiving side has a built-in WRU-2 made by our company.

Model
There are 1 models for this product.

Product
Optical link system (NIM) High frequency reference signal transmission/reception system for J-PARC linac & SuperKEKB

Handling Company
Graviton Co., Ltd.

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1 Models of Optical link system (NIM) High frequency reference signal transmission/reception system for J-PARC linac & SuperKEKB

Image	Part Number	Price (excluding tax)	WSM-NIM-1 Light emitting device	WSM-NIM-1 Modulation signal monitor	WSM-NIM-1 output stabilization method	WRU-NIM-1 Temperature control method	WRU-NIM-1 conversion method	WRU-NIM-1 Photodetector	WRU-NIM-1 Reception wavelength range	WRU-NIM-1 Received light level range
	WSM‑NIM‑1 (sending) /WRU‑NIM-1 (receiving)	Available upon quote	Built-in Peltier DFB laser (butterfly type LD module)	One channel is provided to output the input signal to the modulation input terminal as a monitor externally after waveform shaping.	Feedback control of laser drive current by monitor PD current monitoring with built-in laser element	Analog PID servo control method using Peltier element and thermistor	Transimpedance amplifier Equipped with binary detection method limiting amplifier	InGaAs PIN photodiode	1,000nm~1,650nm	+1dBm~-20dBm

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About Company Handling This Product

Graviton Co., Ltd.

Japan

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Optical link system (NIM) High frequency reference signal transmission/reception system for J-PARC linac & SuperKEKB Graviton Co., Ltd.

About This Product

■Transmission side: Wavelength Stabilized Laser Module

■Receiving side: 3Gbps O/E Receiver Module

1 Models of Optical link system (NIM) High frequency reference signal transmission/reception system for J-PARC linac & SuperKEKB

WSM‑NIM‑1 (sending) /WRU‑NIM-1 (receiving)

Other products of Graviton Co., Ltd.

About Company Handling This Product

Optical link system (NIM) High frequency reference signal transmission/reception system for J-PARC linac & SuperKEKB
Graviton Co., Ltd.