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http://hdl.handle.net/2289/6777| Title: | A high-speed, reconfigurable, channel- and time-tagged photon arrival recording system for intensity-interferometry and quantum optics experiments |
| Authors: | Girish, B.S. Pandey, Deepak Ramachandran, Hema |
| Issue Date: | Aug-2017 |
| Publisher: | Springer Verlag |
| Citation: | European Physical Journal Plus, 2017, Vol. 132, p 348 |
| Abstract: | We present a compact, inexpensive multichannel module, APODAS (Avalanche Photodiode Output Data Acquisition System), capable of detecting 0.8 billion photons per second and providing real-time recording on a computer hard-disk, of channel- and time-tagged information of the arrival of upto 0.4 billion photons per second. Built around a Virtex-5 Field Programmable Gate Array (FPGA) unit, APODAS offers a temporal resolution of 5 nanoseconds with zero deadtime in data acquisition, utilising an efficient scheme for time and channel tagging and employing Gigabit ethernet for the transfer of data. Analysis tools have been developed on a Linux platform for multi-fold coincidence studies and time-delayed intensity interferometry. As illustrative examples, the second-order intensity correlation function (g2) of light from two commonly used sources in quantum optics —a coherent laser source and a dilute atomic vapour emitting spontaneously, constituting a thermal source— are presented. With easy reconfigurability and with no restriction on the total record length, APODAS can be readily used for studies over various time scales. This is demonstrated by using APODAS to reveal Rabi oscillations on nanosecond time scales in the emission of ultracold atoms, on the one hand, and, on the other hand, to measure the second-order correlation function on the millisecond time scales from tailored light sources. The efficient and versatile performance of APODAS promises its utility in diverse fields, like quantum optics, quantum communication, nuclear physics, astrophysics and biology. |
| Description: | Restricted Access. |
| URI: | http://hdl.handle.net/2289/6777 |
| ISSN: | 2190-5444 (Online) |
| Alternative Location: | http://dx.doi.org/10.1140/epjp/i2017-11610-x |
| Copyright: | 2017 Springer Verlag for Società Italiana di Fisica |
| Appears in Collections: | Research Papers (LAMP) |
Files in This Item:
| File | Description | Size | Format | |
|---|---|---|---|---|
| 2017_EurPhyJ Plus_132_348.pdf Restricted Access | Restricted Access | 2.44 MB | Adobe PDF | View/Open Request a copy |
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