1560 nm Laser S2400004
The 1560 nm laser to be used for locking to the Rb vapor cell.Information
Location: East Bridge B111A on electornics rack SOPModel number: RFLXA-2K-3-1560.482-1-S-S-1-S.
Serial number: BB04-002845-1574.
Order Placed before Open Project
Caltech PO: S613285
Caltech Property Tag: C0E000079387Specifications not in manual
Wavelength is roughly the wavelength in vacuum, need to set ~ 1.5 GHz low (0.012 nm higher wavelength on 1560 nm light to hit Rb 87 transiton)Piezo voltage range
The internal piezo setpoint can be set to -10V to +15V
An external ±10V can be applied - but not more than this
There are no internal limits or controls
There is an internal gain of 0.5, so an external volt modulates the frequency by 15 MHz/V, not 30 MHz/V like the set point.
Due to this gain, the maximum range without turning off the amplifier is -15 V to +20 V, or 1.05 GHz. The maximum range with fast modulation is 300 MHzParameters for Locking to Rb 87 D2 line
Wavelength: 1560.494 nm
Temperature: 57.012°C
Piezo: 2.332 VContacts
Arturo Chavez-Pirson: Chavez@npphotonics.com (direct email contact with Daniel) Adam Escobar, AEscobar@npphotonics.com (direct email contact with Daniel) Jerry Jaramillo, JJaramillo@npphotonics.com (cc'ed on email chain with Daniel) Matthew Kane Yeary, myeary@npphotonics.com (cc'ed on email chain with Daniel)Direct quotes from the manufacturer
The RFLXA system with Tunability & Modulation option uses an internal amplifier which appears as a 20kΩ resistive load. The TIP of the External Piezo BNC connector is the Positive terminal, and should be operated in the range -10V to +10V. The amplifier is configured as a single ended input. The Ring of the BNC is the signal ground connection.
An internal DC voltage is used for 2nd mode avoidance. This internally generated DC voltage is added to the external signal on the BNC TIP pin and then applied to the piezo. Note that a gain of 0.5 is applied to the signal on the BNC pin , so that when 10V is applied externally; 5V is applied to the piezo. The piezo voltage displayed by the FLCP software is the internally generated signal only and not the sum of the internal and external signals.
So in your case of applying a -10V externally when the internal piezo setpoint is set to -10, you would get -15V applied to the piezo. In the case of applying +10V externally when the internal piezo setpoint is set to +15, you would get +20V applied to the piezo. "
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