CORRECTIONS TO BOOK: "FIBRE BRAGG GRATINGS" 2nd.
2009, By Raman Kashyap
Chapter 3 reference 153
M. Gagne, J. Bartschke
and R. Kashyap,
“Strong gratings
written in nonhydrogen loaded
optical fibers with a
213nm wavelength Qswitched laser
radiation”, Submitted
to Optics Lett.
Page 227, 2nd. Last para
“…11 x 0.182mm long
gratings, each
separated by
1.555mm.”
Page 230, 2nd. Last line
“Figure 6.13
shows……..and a
refractive index
modulation of 2 x 104.”
Page 231, 2nd para
387, line 16
388, Figure 8.38 caption
388, last line before Section 8.9.3
389, Figure 8.39
390, Figure 8.40
391, Figure 8.41
391, line 1
392, Figure 8.42
392, line 3
392, Figure 8.44
393, line 5
393, line 5
393, 2nd Paragraph, 3rd. last line
394, Figure 8.45
Figure 6.11a caption
“….gap of 5mm in the
cente.”
[17]
(From reference [16])
[13]
(From reference [19])
(From reference [22])
(From reference [23])
[24]
(From reference [29])
[30]
(From reference [31])
[30]
[30]
[33]
(From reference [40])
Fig.
6.11a.
The
reflectivity
spectrum
of
a
super-structure
grating with 9 
222 micron grating
sections separated
by
1mm
gaps.
Edition, Academic Press
M. Gagne and R. Kashyap,
“Strong gratings written in
hydrogen-free optical
fibers with 213nm
wavelength Q-switched
laser radiation”, In
preparation for
publication.
“…10 x 0.2mm long
gratings,
each
separated by 1 mm
optical length.”
Figure 6.13 shows
the
transmission
characteristics of a
FP filter with two
gratings,
each
0.5mm long with a
physical
gap
of
2.5mm
and
a
refractive
index
modulation of 2 x
10-4.
“…gap of 2.5mm in
the center.”
[156]
(From reference [155])
[152]
(From reference [158])
(From reference [161])
(From reference [162])
[163]
(From reference [168])
[169]
(From reference [170])
[169]
[169]
[172]
(From reference [179])
Fig.
6.11a.
The
reflectivity
spectrum
of a super-structure
grating with 10  200
microns long grating
sections,
each
separated by gaps of
1mm optical length.
Figure 6.11b caption
Figure 6.9 caption
Figure 6.13 caption
Refractive
index
modulation
amplitude is 10-3.
The refractive index
modulation amplitude
is 10-3.
Figure 6.11b. The
transmission
spectrum of the
grating shown in
Fig.
6.11a.
Also
shown
is
the
transmission
spectrum
of
a
single section of the
grating of 0.181
microns long. The
envelope has been
normalized to fit
the super-structure
spectra.
Figure 6.9. A 20
 /2 phase-step
grating
bandpass filter. Each
band pass has
an extinction of
>30dB, but with
some side-lobe
structure at 15dB.
Ghosts
appear
inbetween
the
main
passbands
as
a
result of the
super-structure
of phase-steps
at
-30dB
transmission.
Figure
6.11b.
The
transmission spectrum of
the grating shown in Fig.
6.11a with the 9 stitches.
Also
shown
is
the
transmission spectrum of
a single section of the
grating of 0.2 mm long.
The envelope has been
normalized to fit the
super-structure spectra.
Figure 6.13. A
FP filter with a
5mm
gap.
Grating lengths
are 0.5mm with
index
modulation
of
2e-4.
The
arrows
show
where
WDM
channels
may
be placed within
the
band-pass
filter for soliton
Figure 6.9. A 9  /2
phase-step grating bandpass filter. Each band pass
has an extinction of
>30dB, but with some
side-lobe structure at 15dB. Ghosts appear inbetween the main passbands as a result of the
super-structure of phasesteps at -30dB
transmission. nmod = 2 x
10-3.
Figure 6.13. A FP
filter with a 2.5mm
physical
gap.
Grating lengths are
0.5mm with index
modulation of 2e4. The arrows show
where
WDM
channels may be
placed within the
band-pass filter for
soliton guiding.
guiding.
Figure 6.14 caption
Figure 6.14. A
4mm
long
grating FP filter
with a 5mm gap
and a n of 5e4.
Figure 6.22 Legend on graph
Figure
6.14.
A
4mm long grating
FP filter with a
2.5mm optical gap
and a n of 5e-4.
Swap square and
triangle markers in
legend box. i.e.
triangle
for
(pi
phase
diff)
and
square for (0 phase
diff)
Figure 6.23 caption
Figure 6.23. The
reflectivity and bandpass spectrum of the
asymmetric Michelson
interferometer. The
one way path
imbalance is
0.667mm and the
apodised gratings are
nmod
-3
of 1 x 10 [42].
Figure 6.24 caption
Figure 6.24. The
apodised
reflection(dashed line)
and band-pass
(continuous line) of the
asymmetric Michelson
interferometer, with a
path difference of
2.67mm. The output is
sinusoidal as is the
case of a low finesse FP
interferometer.
Figure 6.11a caption
Fig.
6.11a.
The
reflectivity
spectrum
of
a
super-structure
grating with 9 
222 micron grating
Figure 6.23. The
reflectivity
and
band-pass
spectrum of the
asymmetric
Michelson
interferometer. The
one-way
path
imbalance is 1mm
and the apodised
gratings are 2mm
long with a Dnmod
of 1.5 x 10-3 [42].
Figure 6.24. The
apodised reflection
(dashed line) and
band-pass
(continuous line) of
the
asymmetric
Michelson
interferometer,
with
a
path
difference of 4mm.
The
output
is
sinusoidal as is the
case of a low
finesse
FP
interferometer. The
Bragg wavelength
is 1552nm.
Fig.
6.11a.
The
reflectivity
spectrum
of a super-structure
grating with 10  200
microns long grating
sections,
each
Figure 6.11b caption
Figure 6.9 caption
Figure 6.13 caption
sections separated
by
1mm
gaps.
Refractive
index
modulation
amplitude is 10-3.
separated by gaps of
1mm optical length.
The refractive index
modulation amplitude
is 10-3.
Figure 6.11b. The
transmission
spectrum of the
grating shown in
Fig.
6.11a.
Also
shown
is
the
transmission
spectrum
of
a
single section of the
grating of 0.181
microns long. The
envelope has been
normalized to fit
the super-structure
spectra.
Figure 6.9. A 20
 /2 phase-step
grating
bandpass filter. Each
band pass has
an extinction of
>30dB, but with
some side-lobe
structure at 15dB.
Ghosts
appear
inbetween
the
main
passbands
as
a
result of the
super-structure
of phase-steps
at
-30dB
transmission.
Figure
6.11b.
The
transmission spectrum of
the grating shown in Fig.
6.11a with the 9 stitches.
Also
shown
is
the
transmission spectrum of
a single section of the
grating of 0.2 mm long.
The envelope has been
normalized to fit the
super-structure spectra.
Figure 6.13. A
FP filter with a
5mm
gap.
Grating lengths
are 0.5mm with
index
modulation
of
2e-4.
The
arrows
show
where
WDM
channels
may
be placed within
Figure 6.9. A 9  /2
phase-step grating bandpass filter. Each band pass
has an extinction of
>30dB, but with some
side-lobe structure at 15dB. Ghosts appear inbetween the main passbands as a result of the
super-structure of phasesteps at -30dB
transmission. nmod = 2 x
10-3.
Figure 6.13. A FP
filter with a 2.5mm
physical
gap.
Grating lengths are
0.5mm with index
modulation of 2e4. The arrows show
where
WDM
channels may be
placed within the
band-pass filter for
soliton guiding.
the
band-pass
filter for soliton
guiding.
Figure 6.14 caption
Figure 6.14. A
4mm
long
grating FP filter
with a 5mm gap
and a n of 5e4.
Figure 6.22 Legend on graph
Swap square and
triangle markers in
legend box. i.e.
triangle
for
(pi
phase
diff)
and
square for (0 phase
diff)
Figure 6.23 caption
Figure 6.23. The
reflectivity and bandpass spectrum of the
asymmetric Michelson
interferometer. The
one way path
imbalance is
0.667mm and the
apodised gratings are
nmod
-3
of 1 x 10 [42].
Figure 6.24 caption
Figure 6.24. The
apodised
reflection(dashed line)
and band-pass
(continuous line) of the
asymmetric Michelson
interferometer, with a
path difference of
2.67mm. The output is
sinusoidal as is the
case of a low finesse FP
interferometer.
Figure 6.28 and 6.29.
Figure
6.14.
A
4mm long grating
FP filter with a
2.5mm optical gap
and a n of 5e-4.
Figure 6.23. The
reflectivity
and
band-pass
spectrum of the
asymmetric
Michelson
interferometer. The
one
way
path
imbalance is 1mm
and the apodised
gratings are 2mm
long with a Dnmod
of 1.5 x 10-3 [42].
Figure 6.24. The
apodised reflection
(dashed line) and
band-pass
(continuous line) of
the
asymmetric
Michelson
interferometer,
with
a
path
difference of 4mm.
The
output
is
sinusoidal as is the
case of a low
finesse
FP
interferometer. The
Bragg wavelength
is 1552nm.
Swap graphs only,
not captions.