Chris Deep

5 Questions 12 Answers 0 Followers

Questions related from Chris Deep

Is it possible to determine the Time of Emission for a Single Photon?

Hello, This is a question for experimental physicists working with single photon sources. Does anyone know the current limit of accuracy for knowing the time at which a single photon is emitted...

10 October 2017 8,692 8 View

Has anybody come across phased array antennas that use different functions of phase shift vs. frequency?

Wondered if anyone has come across phased array antennas that use different functions of phase shift vs. frequency. There is a lot of literature with true time delays that give a linear phase...

01 January 2016 10,008 5 View

Any advice on Ultra Wide Band Low Noise Amplifiers 10MHz to 45GHz?

Hi, Does anyone know what sort of technologies and circuit topologies are commonly used to make wideband LNAs with high IP3 such as the one...

08 August 2015 5,421 7 View

Is surface recombination the only limiting factor in the responsivity of photo-illuminated semiconductors?

I am trying to find a formula that defines the general shape of the responsivity vs. wavelength curve for semiconductors such as silicon, Ge, GaAs. (See attached picture for examples of...

11 November 2014 4,987 4 View

Does anyone have experience with collimating a high power laser diode?

High power laser diodes typically have large facet sizes and large beam divergence angles and hence do not collimate well with standard techniques (e.g. aspheric lenses, GRIN lenses, etc..). I am...

01 January 2014 7,318 12 View