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-rw-r--r--content/know/concept/self-phase-modulation/index.pdc4
1 files changed, 3 insertions, 1 deletions
diff --git a/content/know/concept/self-phase-modulation/index.pdc b/content/know/concept/self-phase-modulation/index.pdc
index 868fd68..1ec3fdd 100644
--- a/content/know/concept/self-phase-modulation/index.pdc
+++ b/content/know/concept/self-phase-modulation/index.pdc
@@ -71,7 +71,9 @@ $$\begin{aligned}
A(z, t) = \sqrt{P_0} \exp\!\Big(\!-\!\frac{t^2}{2 T_0^2}\Big) \exp\!\bigg( i \gamma z P_0 \exp\!\Big(\!-\!\frac{t^2}{T_0^2}\Big) \bigg)
\end{aligned}$$
-<img src="pheno-spm.jpg">
+<a href="pheno-spm.jpg">
+<img src="pheno-spm-small.jpg">
+</a>
The **instantaneous frequency** $\omega_\mathrm{SPM}(z, t)$,
which describes the dominant angular frequency at a given point in the time domain,