Fiber-Optics Obstacle Course

Admin — Tue, 03 Nov 2026 21:26:00 GMT

Activities

← Older revision		Revision as of 21:26, 3 November 2026
(3 intermediate revisions by the same user not shown)
Line 34:		Line 34:

	=== Activities ===		=== Activities ===
	~~#Read the first 4 chapters of John Crisp's eBook, ''Introduction to Fiber Optics''. Consult remaining chapters as needed.~~		# Read ''Fundamentals of Photonics'' Chpt 8 by Saleh & Teich - 1991 Edition.
	# Read ''Fundamentals of Photonics'' Chpt 9 by Saleh & Teich ~~(on APL bookshelf)~~.
	#Look over the APL's Fiber Optics Wiki page [[Fiber Optics]] and links therein. [https://www.newport.com/t/fiber-optic-basics This info from Newport may be useful as well ].		#Look over the APL's Fiber Optics Wiki page [[Fiber Optics]] and links therein. [https://www.newport.com/t/fiber-optic-basics This info from Newport may be useful as well ].
	#Consulting Thorlab's Fiber Polishing Manual [[Media:FN96A-Manual.pdf\| Fiber Polishing and Connectorization]] ~~and the (above mentioned) eBook~~ construct a 1 meter SM FC-APC to FC-APC (or FC-PC to FC-PC) fiber patch cable (you will find everything you need at the fiber polishing station).<br> [[Fiber Epoxy Mixing Instructions]]<br>[[Media:Thorlabs_Polishing_Film.jpg\| Fiber Polishing Film Grades - color code/grit size]]		#Consulting Thorlab's Fiber Polishing Manual [[Media:FN96A-Manual.pdf\| Fiber Polishing and Connectorization]] construct a 1 meter SM FC-APC to FC-APC (or FC-PC to FC-PC) fiber patch cable (you will find everything you need at the fiber polishing station).<br> [[Fiber Epoxy Mixing Instructions]]<br>[[Media:Thorlabs_Polishing_Film.jpg\| Fiber Polishing Film Grades - color code/grit size]]
	## Measure power loss through your patch cable.<br>[[File:Fs-fiber_coupler.jpg\| thumb\| fiber coupler\|right\|200px]]		## Measure power loss through your patch cable.<br>[[File:Fs-fiber_coupler.jpg\| thumb\| fiber coupler\|right\|200px]]
	~~## Read ''Optical Fiber Fusion Splicing'' Chpts 1 & 2 by Yablon (on APL bookshelf).<br>~~		## Break your patch cable in the middle and repair it with a fusion splice (consult appropriate splicer manual).<br>
	## Break your patch cable in the middle and repair it with a fusion splice (~~see fusion~~ splicer manual ~~[[Media:X77_Fusion_Splicer.pdf\| Fusion Splicer Manual]] and eBook~~.<br>
	## Measure the power loss through your fusion spliced patch cable.<br>		## Measure the power loss through your fusion spliced patch cable.<br>
	## Break the fusion splice out of the patch cord leaving two partly-connectorized fibers. Strip and cleave the unconnectorized end of one of the fibers and use the free-space-to-fiber coupler (with a 10x objective) to couple a free space HeNe beam into the fiber (our coupler is not quite as that shown at the right). You should be able to (with a little persistence) get more than 1 mW of power out of the fiber. Observe the transverse modes of the (at HeNe wavelength) MM fiber. See if, by bending the fiber, you can observe a few different transverse modes. Can you identify the modes?<br>		## Break the fusion splice out of the patch cord leaving two partly-connectorized fibers. Strip and cleave the unconnectorized end of one of the fibers and use the free-space-to-fiber coupler (with a 10x objective) to couple a free space HeNe beam into the fiber (our coupler is not quite as that shown at the right). You should be able to (with a little persistence) get more than 1 mW of power out of the fiber. Observe the transverse modes of the (at HeNe wavelength) MM fiber. See if, by bending the fiber, you can observe a few different transverse modes. Can you identify the modes?<br>
Line 52:		Line 50:
	## Using the applet's "One Atom" window (and no mirrors) explore ''spontaneous emission''. What can you say about the directional properties on a spontaneously emitted photon?		## Using the applet's "One Atom" window (and no mirrors) explore ''spontaneous emission''. What can you say about the directional properties on a spontaneously emitted photon?
	## Using the applet's "Multiple Atoms" window (with mirrors), play around until you have a '''LASER''' ('''L'''ight '''A'''mplification do to '''S'''timulated '''E'''mission of '''R'''adiation). What can you say about the directional properties of a stimulated-emission photon?		## Using the applet's "Multiple Atoms" window (with mirrors), play around until you have a '''LASER''' ('''L'''ight '''A'''mplification do to '''S'''timulated '''E'''mission of '''R'''adiation). What can you say about the directional properties of a stimulated-emission photon?
	# Construct an Erbium-Doped CW SM Fiber Ring Laser.		# '''Construct an Erbium-Doped CW SM Fiber Ring Laser'''.
	## Measure its optical power vs. pump current/power curve.		## Measure its optical power vs. pump current/power curve.
	## Measure its optical spectrum both just below and well above threshold. Is there a difference? Can you explain?		## Measure its optical spectrum both just below and well above threshold. Is there a difference? Can you explain?
			## Measure its short and long term stability
			## Measure/Observe its output polarization characteristics



	* '''CLEAN UP THE OBSTACLE COURSE SETUP AFTER USE'''		* '''CLEAN UP THE OBSTACLE COURSE SETUP AFTER USE'''

APL_wiki - Recent changes [en]

Fiber-Optics Obstacle Course