Ti:Sapph Laser - Revision history

Karpel: /* Equipment */

2016-07-25T20:39:35Z

Equipment

← Older revision		Revision as of 20:39, 25 July 2016
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	== Equipment ==		== Equipment ==
			Diode data sheet:
	[[File:NDB7A75.png]]		[[File:NDB7A75.png]]

			Water blocks:
			[[File:waterblock.pdf]]

			Crystal base:
			[[File:9081g.pdf]]

	== Cavity Geometry ==		== Cavity Geometry ==

Karpel at 20:36, 25 July 2016

2016-07-25T20:36:06Z

← Older revision		Revision as of 20:36, 25 July 2016
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			== Equipment ==
			[[File:NDB7A75.png]]

	== Cavity Geometry ==		== Cavity Geometry ==

Karpel at 14:45, 11 September 2015

2015-09-11T14:45:06Z

← Older revision		Revision as of 14:45, 11 September 2015
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	# Place the output coupler at the desired distance for the long arm. Use the iris from step 2 to make sure it retroreflects the beam precisely.		# Place the output coupler at the desired distance for the long arm. Use the iris from step 2 to make sure it retroreflects the beam precisely.
	# Place the flat mirror at the short arm distance from the first curved mirror. Use the iris to align the retroreflection from the back of the mirror.		# Place the flat mirror at the short arm distance from the first curved mirror. Use the iris to align the retroreflection from the back of the mirror.



			== Things to Try ==

			Remove short arm flat mirror and align blue along hene/780

			Mode match 780 and look for interference at the output

Karpel: /* Alignment Procedure */

2015-09-10T15:16:13Z

Alignment Procedure

← Older revision		Revision as of 15:16, 10 September 2015
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	== Alignment Procedure ==		== Alignment Procedure ==

	# Set up the HeNe so that is intersects some point at the cavity folding angle (relative to a line of holes on the table). At that point, place the center of the first curved mirror.		# Set up the HeNe so that it intersects some point at the cavity folding angle (relative to a line of holes on the table). At that point, place the center of the first curved mirror.
	# Angle the first curved mirror so that the beam travels straight along the hole line.		# Angle the first curved mirror so that the beam travels straight along the hole line.
	# Place an iris along the HeNe path after the second HeNe mirror but before where cavity flat mirror will be set up. Make sure the beam passes through the iris when almost closed.		# Place an iris along the HeNe path after the second HeNe mirror but before where cavity flat mirror will be set up. Make sure the beam passes through the iris when almost closed.

Karpel: /* Cavity Geometry */

2015-09-10T15:09:15Z

Cavity Geometry

← Older revision		Revision as of 15:09, 10 September 2015
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	Short arm length = 15 cm		Short arm length = 15 cm

	Long arm length = 80 cm		Long arm length = 80 cm

	Focusing region = 10.45 cm		Focusing region = 10.45 cm

	Crystal is 5.1 cm from 7.5 cm ROC mirror		Crystal is 5.1 cm from 7.5 cm ROC mirror

	Folding angle is 18 deg		Folding angle is 18 deg

			Will see if it's possible to move the short arm in and decrease the folding angle (both of these help the astigmatism). Geometric constraints of the mirror mounts prevent the original fully optimized version.

	== Alignment Procedure ==		== Alignment Procedure ==

Karpel: /* Cavity Geometry */

2015-09-10T15:08:15Z

Cavity Geometry

← Older revision		Revision as of 15:08, 10 September 2015
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	== Cavity Geometry ==		== Cavity Geometry ==

			Short arm length = 15 cm
	The cavity is 91.5 cm long, with a 10 cm short arm, a 70 cm long arm, and an 11.5 cm focusing region.
			Long arm length = 80 cm
			Focusing region = 10.45 cm
			Crystal is 5.1 cm from 7.5 cm ROC mirror
			Folding angle is 18 deg

			== Alignment Procedure ==
	The folding angle is 10 degrees.


			# Set up the HeNe so that is intersects some point at the cavity folding angle (relative to a line of holes on the table). At that point, place the center of the first curved mirror.
	The Brewster angle for Ti:Sapph is 60.4 degrees, so the crystal should be tilted by 29.6 degrees.
			# Angle the first curved mirror so that the beam travels straight along the hole line.

	~~The~~ ~~prisms~~ ~~are~~ ~~centered~~ in the ~~middle~~ of the ~~long~~ ~~arm,~~ ~~and~~ ~~are~~ ~~separated~~ by 60 cm ~~(so~~ ~~that~~ ~~each~~ ~~one~~ is 5 cm in ~~from~~ ~~its~~ ~~end of~~ the ~~arm)~~.		# Place an iris along the HeNe path after the second HeNe mirror but before where cavity flat mirror will be set up. Make sure the beam passes through the iris when almost closed.
			# Place the crystal so that the beam travels into the crystal at the Brewster angle (this will require a tilt of 30.4 deg relative to the hole line), and therefore exits parallel to the hole line but slightly displaced. Make sure to get the distance from the center of the crystal to the mirror correct!
			# Place the center of the second curved mirror at the correct distance away from the crystal, on the displaced-but-still-parallel beam path.
			# Angle the second curved mirror so that it propagates away at the cavity folding angle, now on the other side of the hole line.
			# Place the output coupler at the desired distance for the long arm. Use the iris from step 2 to make sure it retroreflects the beam precisely.
			# Place the flat mirror at the short arm distance from the first curved mirror. Use the iris to align the retroreflection from the back of the mirror.

Karpel: Created page with "== Cavity Geometry == The cavity is 91.5 cm long, with a 10 cm short arm, a 70 cm long arm, and an 11.5 cm focusing region. The folding angle is 10 degrees. The Brewster an..."

2015-09-02T20:22:46Z

Created page with "== Cavity Geometry == The cavity is 91.5 cm long, with a 10 cm short arm, a 70 cm long arm, and an 11.5 cm focusing region. The folding angle is 10 degrees. The Brewster an..."

New page

== Cavity Geometry ==

The cavity is 91.5 cm long, with a 10 cm short arm, a 70 cm long arm, and an 11.5 cm focusing region.

The folding angle is 10 degrees.

The Brewster angle for Ti:Sapph is 60.4 degrees, so the crystal should be tilted by 29.6 degrees.

The prisms are centered in the middle of the long arm, and are separated by 60 cm (so that each one is 5 cm in from its end of the arm).